PHP 怎么调用统计数据库排名

比如表里面的字段有2个，一个姓名，一个成绩

1.name=张三 fs=87.5
2.name=张三 fs=70
3.name=李四 fs=85
4.name=李四 fs=90

我现在想统计一个排名，比如
“张三”的总分是87.5+70=157.5
“李四”的总分是85+90=175.5
175.5>157.5
李四第一名，张三第二名
我怎么得到这个1和2

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SELECT 
    @n := @n +1 n,
    name,
    sum(score) AS sum_score
FROM tbl, (SELECT @n := 0) m
GROUP BY name 
ORDER BY sum_score DESC

Ref:
http://stackoverflow.com/questions/16555...

http://sqlfiddle.com/#!2/2d3a4/3

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SELECT SUM(fs) as sumfs,name from demo GROUP BY name order by sumfs desc

得到的数据结果就是按照总分数从高到低排序的

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表结构和数据截图

SQL语句

SELECT name,sum(score) a from test GROUP BY name order by a desc

有点看不惯fs这种字段命名，自作主张改成了score