查询LSCJMB表中F_CJZY对应列值重复的数据:
SELECT F_CJZY,COUNT(F_CJZY) FROM LSCJMB GROUP BY F_CJZY HAVING COUNT( F_CJZY )>1
查出了重复的列及重复行数:
删除全部涉及重复的数据:
delete from LSCJMB where F_CJZY in(SELECT F_CJZY,COUNT(F_CJZY) FROM LSCJMB GROUP BY F_CJZY HAVING COUNT( F_CJZY )>1);
需要保存某一列,然后删除剩余的列的话,用如下sql,删除了输了F_GUID最大列以外的所有数据。可以当作是 ID 最大的列。
delete from LSCJMB where F_GUID not in(select t.F_GUID1 from (select max (a.F_GUID) F_GUID1 from LSCJMB a group by a.F_CJZY)as t );