查询一个表内相同纪录 无 select?*?from?表?where?ID?in?(select?ID?from?表?group?by?ID?having?sum(1)1) select?*?from?表?where?ID1+ID2+ID3?in(select?ID1+ID2+ID3?from?表?group?by?ID1,ID2,ID3?having?sum(1)1) --方法1：????SELECT??*FROM??zy_bho??a
查询一个表内相同纪录
select?*?from?表?where?ID?in?(select?ID?from?表?group?by?ID?having?sum(1)>1)
select?*?from?表?where?ID1+ID2+ID3?in(select?ID1+ID2+ID3?from?表?group?by?ID1,ID2,ID3?having?sum(1)>1)
--方法1：???? SELECT??*FROM??zy_bho??a??WHERE??EXISTS? ??(SELECT??1??FROM??zy_bho??WHERE??[PK]??<>??a.[PK]??AND??ZYH??=??a.ZYH)? ??? --方法2： select??a.*??from??zy_bho??a??join??zy_bho??b? ??????on??(a.[pk]<>b.[pk]??and??a.zyh=b.zyh)? ??? --方法3： select??*??from??zy_bbo??where??zyh??in? (select??zyh??from??zy_bbo??group??by??zyh??having??count(zyh)>1)? --其中pk是主键或是?unique的字段。
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