表结构如下:
id uid scroe-------------1 1 1.52 1 1.83 2 -5.54 3 0.85 2 8.26 1 -27 4 38 2 2.3--------------
用户 分数------------1 1.51 1.81 -21汇总 1.32 -5.52 8.22 2.32汇总 5.03 0.83汇总 0.84 34汇总 3
http://sqlfiddle.com/#!2/8446d2/11
http://sqlfiddle.com/#!2/8446d2/11
++
http://sqlfiddle.com/#!2/8446d2/11