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MySQL中删除重复数据只保留一条
DELETEFROM jk_his_zybrcryxxb aWHERE (a.brid, a.zycs,a.ryrq) IN ( select * FROM( SELECT brid, zycs,ryrq FROM jk_his_zybrcryxxb GROUP BY brid,zycs,ryrq HAVING count(*) >MySQL中删除重复数据只保留一条
DELETEFROM jk_his_zybrcryxxb aWHERE (a.brid, a.zycs,a.ryrq) IN ( select * FROM( SELECT brid, zycs,ryrq FROM jk_his_zybrcryxxb GROUP BY brid,zycs,ryrq HAVING count(*) >