mysql 分组取前10条数据

1.使用自定义函数

select name,gender,age,rankk 
from
(selectname,gender,age,@rankk:=if(@gen=gender,@rankk+1,1) as rankk,@gen:=gender
from t_user,(select @rankk:=0,@gen:=null) temp   
order by gender,age asc) a where a.rankk < 10;

2.使用row_number() over() 函数

select name,gender,age,rankk 
from
(selectrow_number() over (partition by gender order by gender,age asc) as  rn,gender,agefrom t_user  ) a where a.rankk < 10;