在网上查找删除重复数据保留id最小的数据，方法如下：
DELETE
FROM
people
WHERE
peopleName IN (
SELECT
peopleName
FROM
people
GROUP BY
peopleName
HAVING
count(peopleName) > 1
)
AND peopleId NOT IN (
SELECT
min(peopleId)
FROM
people
GROUP BY
peopleName
HAVING
count(peopleName) > 1
)
自己使用的时候显示报错：
delete from tb where id in (SELECT max(id) from tb GROUP BY user HAVING count(user)>1)
[Err] 1093 - You can't specify target table ‘XXX' for update in FROM clause
暂时不知道是什么原因导致的。
然后想办法分布操作，首先筛选出有重复user的数据，然后用max()选出其中较大的那一行：
SELECT max(id) from tb GROUP BY user HAVING count(user)>1
然后再根据得到的max(id)逐条删除多余的数据
delete from tb where id=xx
是个笨方法，暂时先解决问题吧。
以上所述是小编给大家介绍的Mysql删除重复数据保留最小的id 的解决方法，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！