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。