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