如何称赞附加值

Question

我有一张桌子，这张桌子有三列 像这样

--------------
|Name|ID |Num|
--------------
|A   |001|1  |
|A   |001|2  |
|A   |001|3  |
--------------

我想要显示NAME ID和Num的总数 像anwser

NAME ID  NumTOTAL
A    001 6 

Answer 1

您可以使用SUM()：

SELECT Name, ID, SUM(Num) AS NumTOTAL
FROM yourTable
GROUP BY Name, ID

Answer 2

使用sql

的sum（）函数后很容易

select name,id sum(num) as [Total Num] from tableName Group by name,id