248 lines
94 KiB
HTML
248 lines
94 KiB
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<div id="sina_keyword_ad_area2" class="articalContent newfont_family">
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<div style="margin-bottom:20px; font-family:Verdana,Arial,Helvetica,sans-serif; line-height:25.2000007629395px; background-color:rgb(255,255,255)">
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:'Times new roman'">PIVOT</span><span style="font-family:宋体">用于将列值旋转为列名（即行转列），在SQLServer <wbr></span><span style="font-family:'Times new roman'">2000</span><span style="font-family:宋体">可以用聚合函数配合</span><span style="font-family:'Times new roman'">CASE</span><span style="font-family:宋体">语句实现</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">PIVOT</span><span style="font-family:宋体">的一般语法是：</span><span style="font-family:宋体">PIVOT</span><span style="font-family:宋体">(</span><span style="font-family:宋体">聚合函数(列)FOR
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列 in (…) )AS P</span></span></span></p>
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<p style="margin:10px auto"><span style="font-family:宋体"><span style="font-size:12px">完整语法：</span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px; font-family:'Times new roman'">table_source</span></p>
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<p style="margin:10px auto"><span style="font-size:12px; font-family:'Times new roman'">PIVOT(</span></p>
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<p style="margin:10px auto; text-indent:21pt"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">聚合函数（</span><span style="font-family:'Times new roman'">value_column</span><span style="font-family:宋体">）</span></span></span></p>
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<p style="margin:10px auto; text-indent:21pt"><span style="font-size:12px; font-family:'Times new roman'">FORpivot_column</span></p>
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<p style="margin:10px auto; text-indent:21pt"><span style="font-size:12px; font-family:'Times new roman'">IN()</span></p>
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<p style="margin:10px auto"><span style="font-size:12px; font-family:'Times new roman'">)</span></p>
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<p style="margin:10px auto"> <wbr></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:'Times new roman'">UNPIVOT</span><span style="font-family:宋体">用于将列明转为列值（即列转行），在</span><span style="font-family:'Times new roman'">SQL Server2000</span><span style="font-family:宋体">可以用</span><span style="font-family:'Times new roman'">UNION</span><span style="font-family:宋体">来实现</span></span></span></p>
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<p style="margin:10px auto"><span style="font-family:宋体"><span style="font-size:12px">完整语法：</span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px; font-family:'Times new roman'">table_source</span></p>
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<p style="margin:10px auto"><span style="font-size:12px; font-family:'Times new roman'">UNPIVOT(</span></p>
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<p style="margin:10px auto; text-indent:21pt"><span style="font-size:12px; font-family:'Times new roman'">value_column</span></p>
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<p style="margin:10px auto; text-indent:21pt"><span style="font-size:12px; font-family:'Times new roman'">FORpivot_column</span></p>
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<p style="margin:10px auto; text-indent:21pt"><span style="font-size:12px; font-family:'Times new roman'">IN()</span></p>
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<p style="margin:10px auto"><span style="font-size:12px; font-family:'Times new roman'">)</span></p>
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<p style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-family:宋体"><span style="font-size:12px"><span style="font-size:12px">注意：PIVOT、UNPIVOT是SQL Server2005 <wbr></span><span style="font-size:12px">的语法，使用需修改数据库</span><span style="font-size:12px">兼容级别</span></span></span><span style="font-size:9pt; font-family:Tahoma"><br>
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<wbr></span><span style="font-family:宋体"><span style="font-size:12px">在数据库属性->选项->兼容级别改为 <wbr> 90</span></span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-family:宋体">典型实例</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-family:宋体"><span style="font-size:12px">一、行转列</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">1</span><span style="font-family:宋体">、建立表格</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">if</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:fuchsia">object_id</span><span style="color:gray">(</span><span style="color:red">'tb'</span><span style="color:gray">)</span><span style="color:gray">is</span><span style="color:gray">not</span><span style="color:gray">null</span><span style="color:blue">drop</span><span style="color:blue">table</span>tb</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'">go</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">create</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">table</span>tb<span style="color:gray">(</span></span><span style="font-size:10pt; font-family:宋体">姓名</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">varchar</span><span style="color:gray">(</span>10<span style="color:gray">),</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">varchar</span><span style="color:gray">(</span>10<span style="color:gray">),</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">int</span><span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">insert</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">into</span>tb<span style="color:blue">values</span><span style="color:gray">(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">张三</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">语文</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span>74<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">insert</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">into</span>tb<span style="color:blue">values</span><span style="color:gray">(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">张三</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">数学</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span>83<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">insert</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">into</span>tb<span style="color:blue">values</span><span style="color:gray">(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">张三</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">物理</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span>93<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">insert</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">into</span>tb<span style="color:blue">values</span><span style="color:gray">(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">李四</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">语文</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span>74<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">insert</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">into</span>tb<span style="color:blue">values</span><span style="color:gray">(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">李四</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">数学</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span>84<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">insert</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">into</span>tb<span style="color:blue">values</span><span style="color:gray">(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">李四</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">物理</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">,</span>94<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'">go</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">*</span><span style="color:blue">from</span>tb</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'">go</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">姓名</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">课程</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">分数</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:'Courier new'">---------- ---------------------</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">语文</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">数学</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>83</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">物理</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>93</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">语文</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">数学</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>84</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">物理</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>94</span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">2</span><span style="font-family:宋体">、使用SQLServer 2000静态SQL</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--c</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:宋体">姓名</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'"> <wbr><span style="color:fuchsia">max</span><span style="color:gray">(</span><span style="color:blue">case</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">when</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">语文</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">then</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">else</span>0<span style="color:blue">end<span style="color:gray">)</span></span></span><span style="font-size:10pt; font-family:宋体">语文</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'"> <wbr><span style="color:fuchsia">max</span><span style="color:gray">(</span><span style="color:blue">case</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">when</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">数学</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">then</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">else</span>0<span style="color:blue">end<span style="color:gray">)</span></span></span><span style="font-size:10pt; font-family:宋体">数学</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'"> <wbr><span style="color:fuchsia">max</span><span style="color:gray">(</span><span style="color:blue">case</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">when</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">物理</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">then</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">else</span>0<span style="color:blue">end<span style="color:gray">)</span></span></span><span style="font-size:10pt; font-family:宋体">物理</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'">tb</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">group</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">by</span></span><span style="font-size:10pt; font-family:宋体">姓名</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">姓名</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">语文</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">数学</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">物理</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:'Courier new'">--------------------- ----------- -----------</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>84 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>94</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>83 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>93</span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">3</span><span style="font-family:宋体">、使用SQLServer 2000动态SQL</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--SQLSERVER 2000</span><span style="font-size:10pt; color:green; font-family:宋体">动态</span><span style="font-size:10pt; color:green; font-family:'Courier new'">SQL,</span><span style="font-size:10pt; color:green; font-family:宋体">指课程不止语文、数学、物理这三门课程。</span><span style="font-size:10pt; color:green; font-family:'Courier new'">(</span><span style="font-size:10pt; color:green; font-family:宋体">以下同</span><span style="font-size:10pt; color:green; font-family:'Courier new'">)</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">变量按</span><span style="font-size:10pt; color:green; font-family:'Courier new'">sql</span><span style="font-size:10pt; color:green; font-family:宋体">语言顺序赋值</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">varchar</span><span style="color:gray">(</span>500<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">'select</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span>@sql<span style="color:gray">+</span><span style="color:red">',max(case</span></span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">when'''</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; color:red; font-family:'Courier new'">''' <wbr>then</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">else0
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end)['</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; color:red; font-family:'Courier new'">']'</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span><span style="color:blue">select</span><span style="color:blue">distinct</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">from</span>tb<span style="color:gray">)a<span style="color:green">--</span></span></span><span style="font-size:10pt; color:green; font-family:宋体">同</span><span style="font-size:10pt; color:green; font-family:'Courier new'">fromtb
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group by</span><span style="font-size:10pt; color:green; font-family:宋体">课程，默认按课程名排序</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span>@sql<span style="color:gray">+</span><span style="color:red">'from
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tb group by</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span>@sql<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">使用</span><span style="font-size:10pt; color:green; font-family:'Courier new'">isnull(),</span><span style="font-size:10pt; color:green; font-family:宋体">变量先确定动态部分</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">varchar</span><span style="color:gray">(</span>8000<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:fuchsia">isnull</span><span style="color:gray">(</span>@sql<span style="color:gray">+</span><span style="color:red">','</span><span style="color:gray">,</span><span style="color:red">''</span><span style="color:gray">)</span><span style="color:gray">+</span><span style="color:red">'max(case</span></span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">when'''</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">+</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:red">'''then</span></span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">else0
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end) ['</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">+</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:red">']'</span></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span><span style="color:blue">select</span><span style="color:blue">distinct</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">from</span>tb<span style="color:gray">)<span style="color:blue">as</span>a <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">'select</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,'</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">+</span><span style="color:red">'from
|
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tb group by</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">)</span></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">姓名</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">数学</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">物理</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">语文</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:'Courier new'">--------------------- ----------- -----------</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>84 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>94 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>83 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>93 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74</span></p>
|
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<p align="left" style="margin:10px auto"> <wbr></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">4</span><span style="font-family:宋体">、使用SQLServer 2005静态SQL</span></span></span></p>
|
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<p style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">*</span><span style="color:blue">from</span>tb <wbr><span style="color:gray">pivot</span><span style="color:gray">(</span><span style="color:fuchsia">max</span><span style="color:gray">(</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">)</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">for</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">in</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span></span><span style="font-size:10pt; font-family:宋体">语文</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; font-family:宋体">数学</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; font-family:宋体">物理</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">))</span><span style="font-size:10pt; font-family:'Courier new'">a</span></p>
|
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<p style="margin:10px auto"> <wbr></p>
|
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<p style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'">5</span><span style="font-size:10pt; font-family:宋体">、</span><span style="font-family:宋体"><span style="font-size:12px">使用SQL Server2005动态SQL</span></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">使用</span><span style="font-size:10pt; color:green; font-family:'Courier new'">stuff()</span></p>
|
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|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">varchar</span><span style="color:gray">(</span>8000<span style="color:gray">)</span></span></p>
|
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|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">''</span> <wbr> <wbr><span style="color:green">--</span></span><span style="font-size:10pt; color:green; font-family:宋体">初始化变量</span><span style="font-size:10pt; color:green; font-family:'Courier new'">@sql</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span>@sql<span style="color:gray">+</span><span style="color:red">','</span><span style="color:gray">+</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">from</span>tb<span style="color:blue">groupby</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">变量多值赋值</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:fuchsia">stuff</span><span style="color:gray">(</span>@sql<span style="color:gray">,</span>1<span style="color:gray">,</span>1<span style="color:gray">,</span><span style="color:red">''</span><span style="color:gray">)</span><span style="color:green">--</span></span><span style="font-size:10pt; color:green; font-family:宋体">去掉首个</span><span style="font-size:10pt; color:green; font-family:'Courier new'">','</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">'select* from tb <wbr>pivot
|
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(max(</span></span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)for</span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">in('</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">+</span>@sql<span style="color:gray">+</span><span style="color:red">'))a'</span></span></p>
|
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<p style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span>@sql<span style="color:gray">)</span></span></p>
|
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<p style="margin:10px auto"> <wbr></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">或使用</span><span style="font-size:10pt; color:green; font-family:'Courier new'">isnull()</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">varchar</span><span style="color:gray">(</span>8000<span style="color:gray">)</span></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">–-</span><span style="font-size:10pt; color:green; font-family:宋体">获得课程集合</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:fuchsia">isnull</span><span style="color:gray">(</span>@sql<span style="color:gray">+</span><span style="color:red">','</span><span style="color:gray">,</span><span style="color:red">''</span><span style="color:gray">)</span><span style="color:gray">+</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">from</span>tb<span style="color:blue">groupby</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">'select* from tb <wbr>pivot
|
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(max(</span></span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)for</span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">in('</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">+</span>@sql<span style="color:gray">+</span><span style="color:red">'))a'</span></span></p>
|
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<p style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span>@sql<span style="color:gray">)</span></span></p>
|
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<p style="margin:10px auto"> <wbr></p>
|
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<p align="left" style="margin:10px auto"><span style="font-family:宋体"><span style="font-size:12px">二、行转列结果加上总分、平均分</span></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">1</span><span style="font-family:宋体">、使用SQLServer 2000静态SQL</span></span></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--SQLSERVER 2000</span><span style="font-size:10pt; color:green; font-family:宋体">静态</span><span style="font-size:10pt; color:green; font-family:'Courier new'">SQL</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:宋体">姓名</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">max</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">case</span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">when</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">语文</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">then</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">else</span><span style="font-size:10pt; font-family:'Courier new'">0<span style="color:blue">end</span><span style="color:gray">)</span></span><span style="font-size:10pt; font-family:宋体">语文</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">max</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">case</span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">when</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">数学</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">then</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">else</span><span style="font-size:10pt; font-family:'Courier new'">0<span style="color:blue">end</span><span style="color:gray">)</span></span><span style="font-size:10pt; font-family:宋体">数学</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">max</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">case</span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">when</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">物理</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">then</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">else</span><span style="font-size:10pt; font-family:'Courier new'">0<span style="color:blue">end</span><span style="color:gray">)</span></span><span style="font-size:10pt; font-family:宋体">物理</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">sum</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">)</span><span style="font-size:10pt; font-family:宋体">总分</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">cast</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">avg</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">*</span><span style="font-size:10pt; font-family:'Courier new'">1.0<span style="color:gray">)</span><span style="color:blue">as</span><span style="color:blue">decimal</span><span style="color:gray">(</span>18<span style="color:gray">,</span>2<span style="color:gray">))</span></span><span style="font-size:10pt; font-family:宋体">平均分</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'">tb</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">group</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">by</span></span><span style="font-size:10pt; font-family:宋体">姓名</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">姓名</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">语文</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">数学</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">物理</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">总分</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">平均分</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:'Courier new'">--------------------- ----------- ----------- -----------</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>84 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>94 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>252 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>84.00</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>83 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>93 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>250 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>83.33</span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">2</span><span style="font-family:宋体">、使用SQLServer 2000动态SQL</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--SQLSERVER 2000</span><span style="font-size:10pt; color:green; font-family:宋体">动态</span><span style="font-size:10pt; color:green; font-family:'Courier new'">SQL</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">varchar</span><span style="color:gray">(</span>500<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">'select</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span>@sql<span style="color:gray">+</span><span style="color:red">',max(case</span></span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">when'''</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; color:red; font-family:'Courier new'">''' <wbr>then</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">else0
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end)['</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; color:red; font-family:'Courier new'">']'</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span><span style="color:blue">select</span><span style="color:blue">distinct</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'">tb<span style="color:gray">)</span>a</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span>@sql<span style="color:gray">+</span><span style="color:red">',sum(</span></span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)</span><span style="font-size:10pt; color:red; font-family:宋体">总分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,cast(avg(</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">*1.0)as
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decimal(18,2)) <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:10pt; color:red; font-family:宋体">平均分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">fromtb group by</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span>@sql<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">3</span><span style="font-family:宋体">、使用SQLServer 2005静态SQL</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">m<span style="color:gray">.*,</span>n<span style="color:gray">.</span></span><span style="font-size:10pt; font-family:宋体">总分</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; font-family:'Courier new'">n<span style="color:gray">.</span></span><span style="font-size:10pt; font-family:宋体">平均分</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">*</span><span style="color:blue">from</span>tb <wbr><span style="color:gray">pivot(</span><span style="color:fuchsia">max</span><span style="color:gray">(</span></span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">)</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">for</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">in(</span><span style="font-size:10pt; font-family:宋体">语文</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; font-family:宋体">数学</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; font-family:宋体">物理</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">))</span><span style="font-size:10pt; font-family:'Courier new'">a<span style="color:gray">)</span>m<span style="color:gray">,</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:宋体">姓名</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">sum</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">)</span><span style="font-size:10pt; font-family:宋体">总分</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">cast</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; color:fuchsia; font-family:'Courier new'">avg</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; font-family:宋体">分数</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">*</span><span style="font-size:10pt; font-family:'Courier new'">1.0<span style="color:gray">)</span><span style="color:blue">as</span><span style="color:blue">decimal</span><span style="color:gray">(</span>18<span style="color:gray">,</span>2<span style="color:gray">))</span></span><span style="font-size:10pt; font-family:宋体">平均分</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'">tb</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">group</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">by</span></span><span style="font-size:10pt; font-family:宋体">姓名</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">)</span><span style="font-size:10pt; font-family:'Courier new'">n</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">where</span><span style="font-size:10pt; font-family:'Courier new'">m<span style="color:gray">.</span></span><span style="font-size:10pt; font-family:宋体">姓名</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">=</span><span style="font-size:10pt; font-family:'Courier new'">n<span style="color:gray">.</span></span><span style="font-size:10pt; font-family:宋体">姓名</span></p>
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<p style="margin:10px auto"> <wbr></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">4</span><span style="font-family:宋体">、使用SQLServer 2005动态SQL</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">使用</span><span style="font-size:10pt; color:green; font-family:'Courier new'">stuff()</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">varchar</span><span style="color:gray">(</span>8000<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">''</span> <wbr> <wbr><span style="color:green">--</span></span><span style="font-size:10pt; color:green; font-family:宋体">初始化变量</span><span style="font-size:10pt; color:green; font-family:'Courier new'">@sql</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span>@sql<span style="color:gray">+</span><span style="color:red">','</span><span style="color:gray">+</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">from</span>tb<span style="color:blue">groupby</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">变量多值赋值</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">同</span><span style="font-size:10pt; color:green; font-family:'Courier new'">select@sql
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= @sql + ','+</span><span style="font-size:10pt; color:green; font-family:宋体">课程</span><span style="font-size:10pt; color:green; font-family:'Courier new'">from(select distinct</span><span style="font-size:10pt; color:green; font-family:宋体">课程</span><span style="font-size:10pt; color:green; font-family:'Courier new'">fromtb)a</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:fuchsia">stuff</span><span style="color:gray">(</span>@sql<span style="color:gray">,</span>1<span style="color:gray">,</span>1<span style="color:gray">,</span><span style="color:red">''</span><span style="color:gray">)</span><span style="color:green">--</span></span><span style="font-size:10pt; color:green; font-family:宋体">去掉首个</span><span style="font-size:10pt; color:green; font-family:'Courier new'">','</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">'selectm.* , n.</span></span><span style="font-size:10pt; color:red; font-family:宋体">总分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,n.</span><span style="font-size:10pt; color:red; font-family:宋体">平均分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">from</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:red; font-family:'Courier new'">(select* from (select * from tb) a pivot (max(</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)for</span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">in('</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">+</span>@sql<span style="color:gray">+</span><span style="color:red">'))
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b) m,</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:red; font-family:'Courier new'">(select</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,sum(</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)</span><span style="font-size:10pt; color:red; font-family:宋体">总分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,cast(avg(</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">*1.0)as
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decimal(18,2))</span><span style="font-size:10pt; color:red; font-family:宋体">平均分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">fromtb group by</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)n</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:red; font-family:'Courier new'">wherem.</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">=n.</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span>@sql<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:green; font-family:'Courier new'">--</span><span style="font-size:10pt; color:green; font-family:宋体">或使用</span><span style="font-size:10pt; color:green; font-family:'Courier new'">isnull()</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">varchar</span><span style="color:gray">(</span>8000<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:fuchsia">isnull</span><span style="color:gray">(</span>@sql<span style="color:gray">+</span><span style="color:red">','</span><span style="color:gray">,</span><span style="color:red">''</span><span style="color:gray">)</span><span style="color:gray">+</span></span><span style="font-size:10pt; font-family:宋体">课程</span><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'">tb<span style="color:blue">group</span><span style="color:blue">by</span></span><span style="font-size:10pt; font-family:宋体">课程</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">'selectm.* , n.</span></span><span style="font-size:10pt; color:red; font-family:宋体">总分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,n.</span><span style="font-size:10pt; color:red; font-family:宋体">平均分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">from</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:red; font-family:'Courier new'">(select* from (select * from tb) a pivot (max(</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)for</span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">in('</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">+</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'"> <wbr>@sql<span style="color:gray">+</span><span style="color:red">'))b) m ,</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:red; font-family:'Courier new'">(select</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,sum(</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)</span><span style="font-size:10pt; color:red; font-family:宋体">总分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,cast(avg(</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">*1.0)as
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decimal(18,2))</span><span style="font-size:10pt; color:red; font-family:宋体">平均分</span><span style="font-size:10pt; color:red; font-family:'Courier new'">fromtb group by</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">)n</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:red; font-family:'Courier new'">wherem.</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">=n.</span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span></p>
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<p style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">(</span>@sql<span style="color:gray">)</span></span></p>
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<p style="margin:10px auto"> <wbr></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-family:宋体">二、列转行</span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:'Courier new'">1</span><span style="font-family:宋体">、建立表格</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">if</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:fuchsia">object_id</span><span style="color:gray">(</span><span style="color:red">'tb'</span><span style="color:gray">)</span><span style="color:gray">is</span><span style="color:gray">not</span><span style="color:gray">null</span><span style="color:blue">drop</span><span style="color:blue">table</span>tb</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'">go</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">create</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">table</span>tb<span style="color:gray">(</span></span><span style="font-size:10pt; font-family:宋体">姓名</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">varchar</span><span style="color:gray">(</span>10<span style="color:gray">),</span></span><span style="font-size:10pt; font-family:宋体">语文</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">int</span><span style="color:gray">,</span></span><span style="font-size:10pt; font-family:宋体">数学</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">int</span><span style="color:gray">,</span></span><span style="font-size:10pt; font-family:宋体">物理</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">int</span><span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">insert</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">into</span>tb<span style="color:blue">values</span><span style="color:gray">(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">张三</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; font-family:'Courier new'">74<span style="color:gray">,</span>83<span style="color:gray">,</span>93<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">insert</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">into</span>tb<span style="color:blue">values</span><span style="color:gray">(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">李四</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">,</span><span style="font-size:10pt; font-family:'Courier new'">74<span style="color:gray">,</span>84<span style="color:gray">,</span>94<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'">go</span></p>
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<p style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">*</span><span style="color:blue">from</span>tb</span></p>
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<p style="margin:10px auto"><span style="font-family:'Courier new'"><span style="font-size:12px">go</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">姓名</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">语文</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">数学</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">物理</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:'Courier new'">--------------------- ----------- -----------</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>83 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>93</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>74 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>84 <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr>94</span></p>
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<p style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">2</span><span style="font-family:宋体">、使用SQLServer 2000静态SQL</span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="color:teal"><span style="font-family:'Times new roman'">--SQLSERVER 2000</span></span><span style="color:teal; font-family:宋体">静态</span><span style="color:teal"><span style="font-family:'Times new roman'">SQL</span></span><span style="color:teal; font-family:宋体">。</span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-family:'Times new roman'"><span style="font-size:12px"><span style="color:blue">select</span><span style="color:gray">*<span style="color:blue">from</span></span></span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px; font-family:'Times new roman'">(</span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:'Times new roman'"> <wbr><span style="color:blue">select</span></span><span style="font-family:宋体">姓名</span><span style="font-family:'Times new roman'">,</span><span style="font-family:宋体">课程</span><span style="font-family:'Times new roman'"><span style="color:gray">=</span><span style="color:red">'</span></span><span style="color:red; font-family:宋体">语文</span><span style="font-family:'Times new roman'"><span style="color:red">'</span>,</span><span style="font-family:宋体">分数</span><span style="font-family:'Times new roman'"><span style="color:gray">=</span></span><span style="font-family:宋体">语文</span><span style="font-family:'Times new roman'"><span style="color:blue">from</span>tb</span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-family:'Times new roman'"><span style="font-size:12px"> <wbr><span style="color:blue">union<span style="color:gray">all</span></span></span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:'Times new roman'"> <wbr><span style="color:blue">select</span></span><span style="font-family:宋体">姓名</span><span style="font-family:'Times new roman'">,</span><span style="font-family:宋体">课程</span><span style="font-family:'Times new roman'"><span style="color:gray">=</span><span style="color:red">'</span></span><span style="color:red; font-family:宋体">数学</span><span style="font-family:'Times new roman'"><span style="color:red">'</span>,</span><span style="font-family:宋体">分数</span><span style="font-family:'Times new roman'"><span style="color:gray">=</span></span><span style="font-family:宋体">数学</span><span style="font-family:'Times new roman'"><span style="color:blue">from</span>tb</span></span></span></p>
|
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-family:'Times new roman'"><span style="font-size:12px"> <wbr><span style="color:blue">union<span style="color:gray">all</span></span></span></span></span></p>
|
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:'Times new roman'"> <wbr><span style="color:blue">select</span></span><span style="font-family:宋体">姓名</span><span style="font-family:'Times new roman'">,</span><span style="font-family:宋体">课程</span><span style="font-family:'Times new roman'"><span style="color:gray">=</span><span style="color:red">'</span></span><span style="color:red; font-family:宋体">物理</span><span style="font-family:'Times new roman'"><span style="color:red">'</span>,</span><span style="font-family:宋体">分数</span><span style="font-family:'Times new roman'"><span style="color:gray">=</span></span><span style="font-family:宋体">物理</span><span style="font-family:'Times new roman'"><span style="color:blue">from</span>tb</span></span></span></p>
|
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<p style="margin:10px auto"><span style="font-size:12px; font-family:'Times new roman'">) t</span></p>
|
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:'Times new roman'"><span style="color:blue">order</span><span style="color:blue">by</span></span><span style="font-family:宋体">姓名</span><span style="font-family:'Times new roman'">,<span style="color:fuchsia">case</span></span><span style="font-family:宋体">课程</span><span style="font-family:'Times new roman'"><span style="color:blue">when</span><span style="color:red">'</span></span><span style="color:red; font-family:宋体">语文</span><span style="font-family:'Times new roman'"><span style="color:red">'</span><span style="color:blue">then<strong><span style="color:maroon">1</span></strong>when<span style="color:red">'</span></span></span><span style="color:red; font-family:宋体">数学</span><span style="font-family:'Times new roman'"><span style="color:red">'</span><span style="color:blue">then<strong><span style="color:maroon">2</span></strong>when<span style="color:red">'</span></span></span><span style="color:red; font-family:宋体">物理</span><span style="font-family:'Times new roman'"><span style="color:red">'</span><span style="color:blue">then<strong><span style="color:maroon">3</span></strong>end</span></span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">姓名</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">课程</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr></span><span style="font-size:9pt; font-family:宋体">分数</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:'Courier new'">---------- ---------------</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">语文</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr>74</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">数学</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr>84</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">李四</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">物理</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr>94</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">语文</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr>74</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">数学</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr>83</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:9pt; font-family:宋体">张三</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr> <wbr></span><span style="font-size:9pt; font-family:宋体">物理</span><span style="font-size:9pt; font-family:'Courier new'"> <wbr>93</span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:8pt; font-family:'Courier new'"> <wbr> <wbr></span></p>
|
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">2</span><span style="font-family:宋体">、使用SQLServer 2000动态SQL</span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="color:teal"><span style="font-family:'Times new roman'">--SQLSERVER 2000</span></span><span style="color:teal; font-family:宋体">动态</span><span style="color:teal"><span style="font-family:'Times new roman'">SQL</span></span><span style="color:teal; font-family:宋体">。</span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="color:teal"><span style="font-family:'Times new roman'">--</span></span><span style="color:teal; font-family:宋体">调用系统表动态生态。</span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">varchar</span><span style="color:gray">(</span>8000<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:fuchsia">isnull</span><span style="color:gray">(</span>@sql<span style="color:gray">+</span><span style="color:red">'union
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all '</span><span style="color:gray">,</span><span style="color:red">''</span><span style="color:gray">)</span><span style="color:gray">+</span><span style="color:red">'select</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,[</span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">]='</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:fuchsia">quotename</span><span style="color:gray">(</span><span style="color:blue">Name</span><span style="color:gray">,</span><span style="color:red">''''</span><span style="color:gray">)</span><span style="color:gray">+</span><span style="color:red">',
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[</span></span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">]= '</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">+</span><span style="color:fuchsia">quotename</span><span style="color:gray">(</span><span style="color:blue">Name</span><span style="color:gray">)</span><span style="color:gray">+</span><span style="color:red">'
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fromtb'</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'">syscolumns</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">where</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">Name</span><span style="color:gray">!=</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:gray">and</span>ID<span style="color:gray">=</span><span style="color:fuchsia">object_id</span><span style="color:gray">(</span><span style="color:red">'tb'</span><span style="color:gray">)</span><span style="color:green">--</span></span><span style="font-size:10pt; color:green; font-family:宋体">表名</span><span style="font-size:10pt; color:green; font-family:'Courier new'">tb</span><span style="font-size:10pt; color:green; font-family:宋体">，不包含列名为姓名的其他列</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">order</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">by</span>colid</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">+</span><span style="color:red">'order
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by</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">)</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; font-family:'Courier new'">go</span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p align="left" style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">3</span><span style="font-family:宋体">、使用SQLServer 2005静态SQL</span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="color:teal"><span style="font-family:'Times new roman'">--SQLSERVER 2005</span></span><span style="color:teal; font-family:宋体">动态</span><span style="color:teal"><span style="font-family:'Times new roman'">SQL</span></span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:'Times new roman'"><span style="color:blue">select</span></span><span style="font-family:宋体">姓名</span><span style="font-family:'Times new roman'">,</span><span style="font-family:宋体">课程</span><span style="font-family:'Times new roman'">,</span><span style="font-family:宋体">分数</span><span style="font-family:'Times new roman'"><span style="color:blue">from</span>tb
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unpivot (</span><span style="font-family:宋体">分数</span><span style="font-family:'Times new roman'"><span style="color:blue">for</span></span><span style="font-family:宋体">课程</span><span style="font-family:'Times new roman'"><span style="color:gray">in</span>(<span style="color:red">[</span></span><span style="color:red; font-family:宋体">语文</span><span style="font-family:'Times new roman'"><span style="color:red">]</span>,<span style="color:red">[</span></span><span style="color:red; font-family:宋体">数学</span><span style="font-family:'Times new roman'"><span style="color:red">]</span>,<span style="color:red">[</span></span><span style="color:red; font-family:宋体">物理</span><span style="font-family:'Times new roman'"><span style="color:red">]</span>))
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t</span></span></span></p>
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<p align="left" style="margin:10px auto"> <wbr></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="font-family:宋体">4</span><span style="font-family:宋体">、使用SQLServer 2005动态SQL</span></span></span></p>
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<p style="margin:10px auto"><span style="font-size:12px"><span style="font-size:12px"><span style="color:teal"><span style="font-family:'Times new roman'">--SQLSERVER 2005</span></span><span style="color:teal; font-family:宋体">动态</span><span style="color:teal"><span style="font-family:'Times new roman'">SQL</span></span></span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">declare</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:blue">nvarchar</span><span style="color:gray">(</span>4000<span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">select</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:fuchsia">isnull</span><span style="color:gray">(</span>@sql<span style="color:gray">+</span><span style="color:red">','</span><span style="color:gray">,</span><span style="color:red">''</span><span style="color:gray">)+</span><span style="color:fuchsia">quotename</span><span style="color:gray">(</span><span style="color:blue">Name</span><span style="color:gray">)</span></span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">from</span><span style="font-size:10pt; font-family:'Courier new'">syscolumns</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">where</span><span style="font-size:10pt; font-family:'Courier new'">ID<span style="color:gray">=</span><span style="color:fuchsia">object_id</span><span style="color:gray">(</span><span style="color:red">'tb'</span><span style="color:gray">)</span><span style="color:gray">and</span><span style="color:blue">Name</span><span style="color:gray">not</span><span style="color:gray">in(</span><span style="color:red">'</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">'</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">)</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">order</span><span style="font-size:10pt; font-family:'Courier new'"><span style="color:blue">by</span>Colid</span></p>
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<p align="left" style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">set</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">=</span><span style="color:red">'select</span></span><span style="font-size:10pt; color:red; font-family:宋体">姓名</span><span style="font-size:10pt; color:red; font-family:'Courier new'">,[</span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">],[</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">]from
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tb unpivot ([</span><span style="font-size:10pt; color:red; font-family:宋体">分数</span><span style="font-size:10pt; color:red; font-family:'Courier new'">]for [</span><span style="font-size:10pt; color:red; font-family:宋体">课程</span><span style="font-size:10pt; color:red; font-family:'Courier new'">]in('</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">+</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">+</span><span style="color:red">'))b'</span></span></p>
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<p style="margin:10px auto"><span style="font-size:10pt; color:blue; font-family:'Courier new'">exec</span><span style="font-size:10pt; color:gray; font-family:'Courier new'">(</span><span style="font-size:10pt; font-family:'Courier new'">@sql<span style="color:gray">)</span></span></p>
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<br>
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<div style="font-family:Verdana,Arial,Helvetica,sans-serif; line-height:25.2000007629395px; background-color:rgb(255,255,255)">
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该文章经过本人整理所得,欢迎转载,转载时请加上本文地址;本文基于<a target="_blank" title="Creative Commons Attribution 2.5 China Mainland License" href="http://creativecommons.org/licenses/by/2.5/cn/" target="_blank"><span style="color:#6699CC">署名2.5 中国大陆</span></a>许可协议发布，请勿演绎或用于商业目的，但是必须保留本文的署名<a target="_blank" href="http://www.cnblogs.com/zhangzt/"><span style="color:#6699CC">张志涛</span></a></div>
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</div>
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