关联表的批量更新(ORACLE/SQLSERVER/MySQL)

在SQL SERVER中,关联表的批量更新,可以参看这里:

http://www.cnblogs.com/downmoon/archive/2007/12/29/1019832.html


Oracle下没找到好的语法,临时用这个:

update employee  set hrdeptname=
(select d.DEPTNAME from DEPARTMENT d
where ROWNUM=1 and d.deptID=employee.hrdeptID
)

 

对应的SQL Server语法:

Update employee set hrdeptname=d.DEPTNAME
from DEPARTMENT  d  inner join employee e  on e.HRDEPTID=d.DEPTID
where 1=1;

 

对应的mysql语法:

update employee t,department d
set t.hrdeptname =d.DEPTNAME 
where v.HRDEPTID=t.DEPTID;

 

posted @ 2012-11-05 15:40  邀月  阅读(1954)  评论(0编辑  收藏  举报