SQL语法

update 表1 set 字段1 = bb.字段1 from 表1 as aa,

(select 字段1,字段2 from 表2) bb where aa.字段2 = bb.字段2

 

update t1 set t1.字段1= t2.字段1

from [表1]  t1
inner join [表2] t2 on t1.字段= t2.字段
where t2.字段 = ''

 

 

Access语法

update 表1 as a ,表2 as b set a.字段1= b.字段1 where a.StuNo=b.StuNo