SQLServer借助临时表提高SQL编写效率

 设定临时表f，并且参照临时表对表T_RWB的若干字段进行更新

WITH f AS(
select RWBH,SKIP,SKWW,SKBH,'进行' as RWZT from T_SKQDB as t where id in (select MAX(id) from T_SKQDB where RWZT=1 group by RWBH,RWZT,SJBH) )
update T_RWB SET SKIP=f.SKIP,SKWW=f.SKWW,SKBH=f.SKBH,RWZT=f.RWZT from T_RWB,f where T_RWB.RWBH=f.RWBH

同理，删除和更新共用：

WITH f AS(
select RWBH,SKIP,SKWW,SKBH,'进行' as RWZT from T_SKQDB as t where id in (select MAX(id) from T_SKQDB where RWZT=1 group by RWBH,RWZT,SJBH) )
delete from T_SKRWD where RWBH in (select RWBH from f)