mysql 生成排名字段

假设有test表，下图为表机构和数据，score表示积分。现在要查询积分排名为第几的id？？

查询语句

select id,score,(@rowno:=@rowno+1) as rowno from test,(select (@rowno:=0)) b order by score desc;

查询结果：

这样就得到了根据积分排名的位置了（rowno），要获得id只要在这个表的基础上进行查询就可以了

select id from (select id,score,(@rowno:=@rowno+1) as rowno from test,(select (@rowno:=0)) b order by score desc) c where rowno=1;

rowno的值为你想要查询的名次，就得到对应的id了。

上面的rowno为1，排名第一的id就是2了

一行算这次拍名和上次排名的差：

select aa.id,aa.rowno, bb.rowno, aa.rowno-bb.rowno from
(SELECT * , (@rowno:=@rowno+1) as rowno FROM statisticsystem.report_live_hits a ,(select (@rowno:=0)) b order by duration) as aa,
(SELECT * , (@rowno1:=@rowno1+1) as rowno FROM statisticsystem.report_live_hits a ,(select (@rowno1:=0)) b order by users) as bb
where aa.main_id = bb.main_id and aa.cate_id=bb.cate_id and aa.sub_id=bb.sub_id and aa.root_id=bb.root_id ;