mysql删除指定字段重复数据
删除表中name重复重复数据
查询语句：
select min(id) as id from user group by name；
错误删除语句：
delete from user where id not in (select min(id) as id from user group by name)；
这个是知道无法这么更改的，方案临时表。。真不知道sql在嵌一层就可以了。尴尬
正确删除语句：
delete from user where id not in (select id from ((select min(id) as id from user group by name) tmp));