SQL COUNT GROUP BY

Question

我有这张桌子:

代码包重量
-------------------
11 2 20
12 1 45
11 1 15
12 4 15

我怎样才能得到结果:

代码包重量
-------------------
11 3 35
12 5 60

先谢谢你,Stev

Answer 1

SELECT    Code,
          SUM(Packet) AS Packet,
          SUM([Weight]) AS [Weight]
FROM      [YourTable]
GROUP BY  CODE
ORDER BY  CODE