php - 在我的 sql 中使用 Distinct 和 Sum

Question

下面是我创建的表，我的目标是删除重复的结果然后将值相加。

|  username   |   value
|    Bobby    |     5
|    Bobby    |     5
|    Bobby    |     7

这是我正在寻找的结果

|  username   |   value
|    Bobby    |     12

我怎样才能做到这一点？

score 1 · Accepted Answer

尝试这个

select username, sum(value) from 
(select distinct username,value from mytbl) as tmp  group by username

score 0 · Accepted Answer

0

SELECT SUM(DISTINCT value) FROM TableName Group By UserName

于 2013-10-08T06:25:37.643 回答

score 0 · Accepted Answer

请试试这个

 select username,sum(value) from 
 (
   select username,value from tbl group by username,value
 )data
  group by name

score 0 · Accepted Answer

这是更简单的方法

SELECT distinct(username), sum(distinct value) AS Value from temp1

它肯定有效

4 回答 4