这是mysql数据
id usr good quant delayed cart_ts
------------------------------------------------------
14 4 1 1 0 20100601235348
13 4 11 1 0 20100601235345
12 4 4 1 0 20100601235335
11 4 1 1 0 20100601235051
10 4 11 1 0 20100601235051
9 4 4 1 0 20100601235051
15 4 2 1 0 20100601235350
16 4 7 1 0 20100602000537
17 4 3 1 0 20100602000610
18 4 3 1 0 20100602000616
19 4 8 1 0 20100602000802
20 4 8 1 0 20100602000806
21 4 8 1 0 20100602000828
22 4 8 1 0 20100602000828
23 4 8 1 0 20100602000828
24 4 8 1 0 20100602000828
25 4 8 1 0 20100602000828
26 4 8 1 0 20100602000829
27 4 8 1 0 20100602000829
28 4 9 1 0 20100602001045
29 4 10 1 0 20100602001046
我需要对 usr & good 中的字段进行分组，该字段具有与量化字段求和的重复值 为了得到这样的东西:
id usr good quant delayed cart_ts
------------------------------------------------------
14 4 1 2 0 20100601235348
13 4 11 2 0 20100601235345
12 4 4 2 0 20100601235335
15 4 2 1 0 20100601235350
16 4 7 1 0 20100602000537
17 4 3 2 0 20100602000610
19 4 8 9 0 20100602000802
28 4 9 1 0 20100602001045
29 4 10 1 0 20100602001046
我需要执行哪个 MySQL 查询才能达到此效果？
最佳答案
从表组中选择 id,usr,good,SUM(quant),delayed,cart_ts BY usr,good
关于mysql - 查询对重复字段求和，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2953452/