如果所有重复的内容都删掉可以试试 delete from t where id not in ( select id from t group by c1, c2, c3, c4 having count (*) < 2)
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时间:2019-07-20 17:27:33
如果所有重复的内容都删掉可以试试 delete from t where id not in ( select id from t group by c1, c2, c3, c4 having count (*) < 2)
求问Mysql同比环比SQL语句怎么写 – 数据库 – 前端 mysql存储过程声明集合
2018-06-26