select
* from
(select * from tmp group by userName having count(userName)= 1
union select * from tmp where id in ( select id from tmp group by userName having count(userName)> 1)
) aaa order by id
sql去除重复记录
猜你喜欢
转载自zero1111.iteye.com/blog/2191800
今日推荐
周排行