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select * from [dbo].[Sys_MemberKey] a where exists(select * from [Sys_MemberKey] b where a.FMachineCode<>‘‘ and a.FKeyID=b.FKeyID and a.FMemberID<>b.FMemberID)
一个相同的表根据一个字段,查找另外一个字段不相同值,经测试可用
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原文地址:http://www.cnblogs.com/flyfish2012/p/4847048.html