根据分数，经过sql语句实现排名

可全局排序，也能够根据已有字段(sn)排序：

表（t1）结构：

查询语句：

set @chengji=0;
set @mingci=1;
set @shunxu=0;
/*sql语句*/
select xingming,chengji,mingci
    from
(select xingming,chengji,@shunxu:=@shunxu+1,
if(chengji=@chengji,@mingci,@mingci:=@shunxu) as mingci,
@chengji:=chengji
 from t1 where sn=1 order by chengji desc) as t ;

 更新语句：

set @chengji=0;
set @mingci=1;
set @shunxu=0;
/*sql语句*/
update t1,
(select xingming,chengji,
@shunxu:=@shunxu+1,
if(chengji=@chengji,@mingci,@mingci:=@shunxu) as mingci,
@chengji:=chengji
from t1 where sn=2  order by chengji desc) as t2
set t1.mingci=t2.mingci
WHERE t1.xingming=t2.xingming and t1.chengji=t2.chengji and t1.sn=2;

更新结果：

 

根据原文：http://bbs.csdn.net/topics/250014224 扩展，记录一下！