mysql分组group by后再加序号；mysql group by 排序失效

group by 与排序不能在一个查询中同时使用，但是可以嵌套使用 。比如 查询：

select * from AA where status =1 group by xxx

使用group by 以后进行排序

SET @row_number = 0;SELECT( @row_number := @row_number + 1 ) AS rank_num,t.*FROM(select * from AA where status=1 group by xxx) as t