TSQL，我如何分组行？

在SQL Server 2008中，我有这样的结果：TSQL，我如何分组行？

contact phone  address email 
Name1 435551123  
Name1    street 1 
Name1       [email protected] 
Name2 654987624 
Name2    street2 
Name2       [email protected]

，我要 “压缩” 它像下面这样：

contact phone  address email 
Name1 435551123 street 1 [email protected]  
Name2 654987624 street2 [email protected]

来源

2013-04-29 alesic

让我看看你的http://sqlfiddle.com/ – 2013-04-29 08:22:52

查询规范化表.. – 2013-04-29 08:22:56

尝试查询

select 
contact, 
max(phone), 
max(address), 
max(email) 
from table_name 
group by contact

SQL Fiddle

来源

2013-04-29 08:27:56 Luv

谢谢，有用！ – alesic 2013-04-29 08:39:19

你可以使用CTE和一些OVER clauses：

WITH CTE AS (
    SELECT [contact], 
     [phone]=MAX(PHONE)OVER(PARTITION BY CONTACT), 
     [address]=MAX(address)OVER(PARTITION BY CONTACT), 
     [email]=MAX(email)OVER(PARTITION BY CONTACT), 
      RN = Row_number() 
       OVER( 
       partition BY [contact] 
       ORDER BY [contact]) 
    FROM dbo.Address) 
SELECT [contact], [phone], [address], [email] 
FROM CTE 
WHERE RN = 1

结果：

CONTACT PHONE  ADDRESS   EMAIL 
Name1 435551123 street 1  [email protected] 
Name2 654987624 street2   [email protected]

DEMO

来源

2013-04-29 08:34:37

+1您也可以使用DISTINCT关键字。 http://sqlfiddle.com/#!3/abd17/10 – 2013-04-29 08:38:35

TSQL，我如何分组行？

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