字段遍歷累加

--> 數據庫版本:
--> Microsoft SQL Server 2008 (RTM) - 10.0.1600.22
--> 測試數據：[TB]
IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[TB]')
AND type in (N'U'))
DROP TABLE [TB]
GO

---->建表
create table [TB]([字段1] varchar(1),[字段2] varchar(1))
insert [TB]
select 'a','c' union all
select 'b','c'
GO


SELECT
字段1 =stuff((
select '+'',''+'+convert(varchar(20),字段1) FROM [TB] WHERE 字段2 = a.字段2  for xml path(''))
,1,5,''),a.字段2
FROM [TB] a
group by a.字段2



--> 查詢結果
SELECT * FROM [TB]
--> 刪除表格
--DROP TABLE [TB]