我要评论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。
总结
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
您可能感兴趣的文章:
如您对本文有疑问或者有任何想说的，请点击进行留言回复，万千网友为您解惑！
网友评论