182 lines
15 KiB
HTML
182 lines
15 KiB
HTML
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<div id="sina_keyword_ad_area2" class="articalContent ">
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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1.Datepart()</p>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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<strong>返回代表指定日期的指定日期部分的整数</strong></p>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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<strong>语法 Datepart(datepart,date)</strong></p>
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<h5 style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; text-indent:23px">
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返回类型 <wbr><strong>int</strong></h5>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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datepart:</p>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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<wbr></p>
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<table cellpadding="2" rules="all" border="1" frame="box" style="table-layout:auto!important; width:571px">
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<tbody>
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<tr valign="top">
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<th width="44%">日期部分</th>
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<th width="56%">缩写</th>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>year</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>yy, yyyy</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>quarter</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>qq, q</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>month</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>mm, m</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>dayofyear</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>dy, y</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>day</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>dd, d</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>week</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>wk, ww</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>weekday</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>dw</strong><span style="font-size:10px">日期部分返回对应于星期中的某天的数，例如：Sunday =1</span></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>Hour</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>hh</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>minute</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>mi, n</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>second</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>ss, s</strong></td>
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</tr>
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<tr valign="top">
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<td width="44%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>millisecond</strong></td>
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<td width="56%" style="font-family:Arial; word-wrap:break-word; word-break:break-all; visibility:visible!important; zoom:1!important; font-size:12px; line-height:normal">
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<strong>ms</strong></td>
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</tr>
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</tbody>
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</table>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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declare @date datetime<br style="line-height:normal">
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set @date='2009-12-24 16:35:37.733'<br style="line-height:normal">
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select datepart(year,@date)--2009<br style="line-height:normal">
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select datepart(month,@date)--12<br style="line-height:normal">
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select datepart(day,@date)--24<br style="line-height:normal">
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select datepart(quarter,@date)--4<br style="line-height:normal">
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select datepart(dayofyear,@date)--358<br style="line-height:normal">
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select datepart(weekday,@date)--5<br style="line-height:normal">
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select datepart(week,@date)--52<br style="line-height:normal">
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select datepart(Hour,@date)--16<br style="line-height:normal">
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select datepart(minute,@date)--35</p>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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2.DateName()</p>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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<strong>返回代表指定日期的指定日期部分的字符串</strong></p>
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<h5 style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; text-indent:23px">
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语法 DateName<code><span style="font-family:新宋体"><strong>(datepart</strong><em> <wbr></em><strong>,</strong> <wbr><em>date <wbr></em><strong>)</strong></span></code></h5>
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<h5><code style="line-height:normal; color:rgb(102,102,102); font-size:12px; text-indent:23px"><span style="font-family:新宋体"><strong>返回类型 <wbr></strong>nvarchar</span></code></h5>
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<h5 style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; text-indent:23px">
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参数 <wbr><em>datepart 同上表格</em></h5>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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declare @date datetime<br style="line-height:normal">
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set @date='2009-12-24 16:35:37.733'<br style="line-height:normal">
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select datename(year,@date)--2009<br style="line-height:normal">
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select datename(month,@date)--December<br style="line-height:normal">
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select datename(day,@date)--24<br style="line-height:normal">
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select datename(quarter,@date)--4<br style="line-height:normal">
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select datename(dayofyear,@date)--358<br style="line-height:normal">
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select datename(weekday,@date)--Thursday<br style="line-height:normal">
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select datename(week,@date)--52<br style="line-height:normal">
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select datename(Hour,@date)--16<br style="line-height:normal">
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select datename(minute,@date)--35</p>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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<em>3.其他日期函数</em></p>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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declare @date1 datetime,@date2 datetime<br style="line-height:normal">
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set @date1='2009-10-24 16:35:37.733'<br style="line-height:normal">
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set @date2='2009-12-24 16:35:37.733'<br style="line-height:normal">
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select DAY(@date1)--24<br style="line-height:normal">
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select MONTH(@date1)--10 具有确定性 <wbr><br style="line-height:normal">
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select YEAR (@date1)--2009具有确定性 <wbr><br style="line-height:normal">
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select DATEPART (dw, @date2)</p>
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<p style="line-height:normal; color:rgb(102,102,102); font-family:Georgia; font-size:12px; text-indent:23px">
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select GETDATE() 不具有确定性 <wbr><br style="line-height:normal">
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select GETUTCDATE() 不具有确定性<br style="line-height:normal">
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DATENAME() 不具有确定性<br style="line-height:normal">
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DATEADD(dd,@date1,1) 具有确定性 <wbr><br style="line-height:normal">
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DATEDIFF 具有确定性<br style="line-height:normal">
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DATEPART 除了用作 <wbr><br style="line-height:normal">
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DATEPART (dw, date) 外都具有确定性。dw 是工作日的日期部分，取决于由设置每周第一天的 SET DATEFIRST所设置的值。 <wbr><br style="line-height:normal">
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具有确定性</p>
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<p style="text-indent:23px"> <wbr></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--判断是否为时间</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectcast(isdate('2012-06-02 16:26:07.880') asvarchar)</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--获得年</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">select cast(year('2012-06-0216:26:07.880') as varchar)</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(yyyy,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(yyyy,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--获得月</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">select cast(Month('2012-06-0216:26:07.880') as varchar)</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(mm,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(mm,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--获得日</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">select cast(day('2012-06-0216:26:07.880') as varchar)</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(dd,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(dd,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--获得时</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(hh,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(hh,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--获得分</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">select datepart(n,'2012-06-0216:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">select datename(n,'2012-06-0216:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--获得秒</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(ss,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(ss,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--毫秒</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(ms,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(ms,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--季节</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(qq,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(qq,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--一年中的第几天</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(dy,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(dy,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--一年中的第几周</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(wk,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(wk,'2012-06-02 16:26:07.880')</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">--星期</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatepart(dw,'2012-06-02 16:26:07.880') --SET DATEFIRST 7每周第一天</span></span></p>
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<p><span style="color:#666666"><span style="font-size:12px; line-height:18px">selectdatename(dw,'2012-06-02 16:26:07.880')</span></span></p>
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</div>
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