sql server 数据更新语句示例

-- 关联查询更新

UPDATE a SET WtNo=b.NO
from Task a
INNER JOIN WT_Information b ON a.WtId=b.ID;

-- 分表查询更新

update a set a.ProjectID=b.ProjectID from 
[NoticeSubkey] a,[Project_Projects] b 
where a.ParentProjectID=b.ParentProjectID and a.zt=2