MSSQL 删除重复并只保留一条
Posted Alex_Mercer
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重复值查找
select field1,field2 from table
group by field1,field2 having COUNT(*)>1删除重复值，只保留ID最小的那条
delete table
where field1 in (select field1 from VersionProductRelation a
group by field1,field2 having COUNT(*)>1)
and field2 in (select field2 from VersionProductRelation a
group by field1,field2 having COUNT(*)>1)
and ID not in (
select MIN(ID) from table
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