SELECT * FROM `表名1` WHERE 字段1 in(select sn from 表名1 group by 字段1 having count(*)>1)
SELECT sn ,count(*) as a FROM `表名` group by sn having a>1
sql 查重
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SELECT * FROM `表名1` WHERE 字段1 in(select sn from 表名1 group by 字段1 having count(*)>1)
SELECT sn ,count(*) as a FROM `表名` group by sn having a>1
本站转载的文章为个人学习借鉴使用，本站对版权不负任何法律责任。如果侵犯了您的隐私权益，请联系本站邮箱yoyou2525@163.com删除。