SQL Server查询

Question

我有值

ID BarID FName LName ColA ColB ColC 

1 22 Jon Carr 0 2 1 
2 23 Don Brown 1 3 2 
3 23 Don Brown 2 1 2 
4 24 A  B  0 2 1 
5 24 A  B  2 3 1 
6 24 A  B  1 2 3 

表名称表Temp

我想这个表转换为这样的事情

ID BarID FName LName ColA ColB ColC 

1 22 Jon Carr 0 2 1 
2 23 Don Brown 3 4 4 
4 24 A  B  3 7 5 

最后3列（ColA ColB ColC）的重复行（重复BarID）总结（总和）

我可以在sql server中写什么sql查询来实现这个功能？

Answer 1

SELECT 
    MIN(ID), BarID, FName, LName, SUM(ColA), SUM(ColB), SUM(ColC) 
FROM 
    Temp 
GROUP BY 
    BarID, FName, LName 

Answer 2

您需要使用GROUP BY

SELECT 
    min(id) AS ID, 
    BarID, 
    FName, 
    LName, 
    sum(ColA) AS ColA, 
    sum(ColB) AS ColB, 
    sum(ColC) AS ColC 
FROM 
    Temp 
GROUP BY 
    BarID, FName, LName 

Answer 3

应该用GROUP BY条款很简单：

SELECT 
    MIN(ID) AS 'ID', 
    BarID, FName, LName, 
    SUM(ColA) AS 'ColA', 
    SUM(ColB) AS 'ColB', 
    SUM(ColC) AS 'ColC' 
FROM dbo.Temp 
GROUP BY BarID, FName, LName 

这被总结了列A，B和C，和组BarID, FName, LName