一条话语,删除mysql表的重复数据
一条语句,删除mysql表的重复数据
在网上看到的,觉得有必要记录下。
delete students as a from students as a, (select * from students group by name having count(1)>1) as b where a.name=b.name and a.id > b.id;
达到了效果,就不知道效率如何。如果有更加好的方法,请赐教,不胜感激!