SQL中两个关联表批量更新数据的办法[MSSQL防范]

假如SQL数据库中A表和B表通过key关联,那么若何举行批量更新数据呢?下面就将为您介绍这种批量更新数据的SQL语句写法,供您参考,假如您在SQL批量更新数据方面碰到干涉题,无妨一看,相信对您会有所启迪.

A,B表通过key关联的批量更新数据办法:

批量改正:{

update A

set A.qcye=B.qcye
from B

where A.kmdm=B.kmdm
and   A.fmonth=B.fmonth
and   A.fmonth=0

}

改正之后的查询,后果精确,OK

{

select * from A
where fmonth=0 and qcye<>0
and kmdm like '1606%' and len(kmdm)=10 order by kmdm

select * from B where fmonth=0 and qcye<>0
and kmdm like '1606%' and len(kmdm)=10 order by kmdm

}