删除数据库中的重复记录
SqlServer：
delete from team where id in (select min(id) from team group by [name] having count(id) > 1)
MySql：
Error Code : 1064
You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use near
'[name] having count(id) > 1)' at line 1
(0 ms taken)
so：
create temporary table tmp_wrap select * from users_groups group by uid having count(1) >= 1;
truncate table users_groups;
insert into users_groups select * from tmp_wrap;
drop table tmp_wrap;
OR：
delete team as a from team as a,(select min(id) as id,`name` from team group by `name` having count(id) > 1) as b where a.id=b.id and a.`name`=b.`name`
posted on 2010-07-09 20:57
Ying-er 阅读(2075)
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