Oracle_语句

标签：数据   int   color   ber   date   order by   art   字段   完全   

1、删除 数据库中 重复的记录

1）
select * into #temp from (
select KaiGuanDuan,RongLiangPercent,Hz,RongLiangValue,P,Q,row_number() over(partition by KaiGuanDuan,RongLiangPercent,Hz,RongLiangValue,P,Q order by getdate()) as rId from fuhe
) as a where rId=1
2)
delete from fuhe
3)
insert fuhe(KaiGuanDuan,RongLiangPercent,Hz,RongLiangValue,P,Q) select KaiGuanDuan,RongLiangPercent,Hz,RongLiangValue,P,Q from #temp

ZC: 完全一样的记录，没有 主键，各个列数据都一样，测试下来 是OK
Oracle删除 字段值完全相同的记录，直留一条：
delete from fuhe a where rowid > (select min(rowid) from fuhe b where a.KaiGuanDuan=b.KaiGuanDuan and a.RongLiangPercent=b.RongLiangPercent and a.hz=b.hz and a.P=b.P and a.Q=b.Q);

Z

Oracle_语句

标签：数据   int   color   ber   date   order by   art   字段   完全   

原文地址：http://www.cnblogs.com/DrMess/p/7355900.html