Sql Server 查询多条重复数据 删除并保留一条
2016-09-28 17:15
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总是不会查重和删除多余数据
delete sysdba.PRODUCT from sysdba.PRODUCT a
where exists (select Name,ACTUALID from sysdba.PRODUCT b where a.name=b.name and a.ACTUALID = b.ACTUALID group by Name,ACTUALID having count(*) > 1)
and PRODUCTID not in (select min(PRODUCTID) from sysdba.PRODUCT group by Name,ACTUALID having count(*)>1)
select * from sysdba.PRODUCT a
where exists (select Name,ACTUALID from sysdba.PRODUCT b where a.name=b.name and a.ACTUALID = b.ACTUALID group by Name,ACTUALID having count(*) > 1)
and PRODUCTID not in (select min(PRODUCTID) from sysdba.PRODUCT group by Name,ACTUALID having count(*)>1)
delete sysdba.PRODUCT from sysdba.PRODUCT a
where exists (select Name,ACTUALID from sysdba.PRODUCT b where a.name=b.name and a.ACTUALID = b.ACTUALID group by Name,ACTUALID having count(*) > 1)
and PRODUCTID not in (select min(PRODUCTID) from sysdba.PRODUCT group by Name,ACTUALID having count(*)>1)
select * from sysdba.PRODUCT a
where exists (select Name,ACTUALID from sysdba.PRODUCT b where a.name=b.name and a.ACTUALID = b.ACTUALID group by Name,ACTUALID having count(*) > 1)
and PRODUCTID not in (select min(PRODUCTID) from sysdba.PRODUCT group by Name,ACTUALID having count(*)>1)
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