在我的SQL中使用Distinct和Sum

Question

below is the table i have created, my goal is to remove the duplicate results then add the value up.

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

This is the result I am looking for

|  username   |   value
|    Bobby    |     12

How can I achieve this?

Answer 1

Try this

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

Answer 2

SELECT SUM(DISTINCT value) FROM TableName Group By UserName

Answer 3

please try this

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

Answer 4

Here's simpler way

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