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MySQL数据去重

时间:2021-07-01 10:21:17 帮助过:4人阅读

name, COUNT(*) FROM product GROUP BY name HAVING COUNT(*) > 1;

删除重复数据:

DELETE FROM products AS A JOIN(SELECT name, COUNT(*), MAX(id) AS id FROM products GROUP BY name HAVING COUNT(*) > 1) AS B ON A.name = B.name WHERE A.id < B.id;

 

MySQL数据去重

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