删除（除主键外）的重复数据

[color=red]user表
id name age
1 a 10
2 b 20
3 c 30
4 b 20
5 c 30
6 a 10
7 a 10
删除（除主键外-自增）的重复数据
sql语句[/color]

delete from user where id not in (select min(id) from user group by name, age)

delete from mytest where id not in ( select t1.id from mytest t1 group by t1.name,t1.age)