SQL Group by sum

Question

id group sal 
---------------- 
3 a  1000 
3 b  500 
2 c  2000 

我需要這樣的結果。

id sum 
------- 
3 1500 
2 2000 

Answer 1

SELECT id 
    , SUM(sal) 'sum' 
FROM yourtablename 
GROUP BY id; 

我認爲你在尋找這樣的事情。

Answer 2

你可以group by的id，總結了sal：

SELECT id, SUM(sal) 
FROM  sometable 
GROUP BY id