SQL Server的T-SQL Concat的總

Question

想象我有這個表

BirthDay  |Name 
1-10-2010 | 'Joe' 
2-10-2010 | 'Bob' 
2-10-2010 | 'Alice' 

我怎樣才能得到這樣

BirthDay  |Name 
1-10-2010 | 'Joe' 
2-10-2010 | 'Bob', 'Alice 

TKS結果

Answer 1

試試這個：

set nocount on; 
declare @t table (BirthDay datetime, name varchar(20)) 
insert into @t VALUES ('1-10-2010',  'Joe' ) 
insert into @t VALUES ('2-10-2010',  'Bob' ) 
insert into @t VALUES ('2-10-2010',  'Alice') 
set nocount off 

SELECT p1.BirthDay, 
      stuff(
        (SELECT 
         ', ' + p2.name --use this if you want quotes around the names: ', ''' + p2.name+'''' 
         FROM @t p2 
         WHERE p2.BirthDay=p1.BirthDay 
         ORDER BY p2.name 
         FOR XML PATH('') 
        ) 
        ,1,2, '' 
       ) AS Names 
     FROM @t p1 
    GROUP BY 
     BirthDay 

輸出：

BirthDay    Names 
----------------------- ------------ 
2010-01-10 00:00:00.000 Joe 
2010-02-10 00:00:00.000 Alice, Bob 

(2 row(s) affected) 

Answer 2

該解決方案無需從服務器中的Visual Studio或dll文件進行部署。

複製粘貼和它的工作！

http://groupconcat.codeplex.com/

dbo.GROUP_CONCAT(VALUE) 
dbo.GROUP_CONCAT_D(VALUE), DELIMITER) 
dbo.GROUP_CONCAT_DS(VALUE , DELIMITER , SORT_ORDER) 
dbo.GROUP_CONCAT_S(VALUE , SORT_ORDER)