SQL查詢鮮明列串連另一列

Question

我有一個MS SQL查詢聯接多個表和結果的一個例子是：

EmailAddress   Column2          
--------------------- ---------------- 
sean@abc.com   Value1          
sean@abc.com   Value2 
test@abc.com   Value5 


What I really want to achieve are the following results: 


EmailAddress   Column2          
--------------------- ------------------ 
sean@abc.com   Value1, Value2 
test@abc.com   Value5 

但是也有一些具有相同的電子郵件地址的每一行相同的其他列。任何人都可以幫助我使用SQL返回不同的電子郵件地址並連接column2信息嗎？

感謝您的任何反饋意見。

Answer 1

嘗試回答this question

Answer 2

在SQL Server 2005+：

WITH q AS 
     (
     SELECT 'sean@abc.com' AS address, 'Value1' AS value 
     UNION ALL 
     SELECT 'sean@abc.com', 'Value2' 
     UNION ALL 
     SELECT 'test@abc.com', 'Value5' 
     ) 
SELECT (
     SELECT CASE WHEN ROW_NUMBER() OVER (ORDER BY value) > 1 THEN ', ' ELSE '' END + value 
     FROM q qi 
     WHERE qi.address = qo.address 
     FOR XML PATH('') 
     ) 
FROM (
     SELECT DISTINCT address 
     FROM q 
     ) qo 

Answer 3

傑里米相同的答案，但我會用other答案與XML PATH招