declare @s varchar(1000)
select @s=isnull(@s+',','')+username from Employee
select @s as username

--------------------------------------------------------------------------
--  Author : htl258(Tony)
--  Date   : 2010-03-31 00:38:11
--  Version:Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86)
--          Jul  9 2008 14:43:34
--          Copyright (c) 1988-2008 Microsoft Corporation
--          Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 2)
--------------------------------------------------------------------------
--> 生成测试数据表:EmployeeIF NOT OBJECT_ID('[Employee]') IS NULLDROP TABLE [Employee]
GO
CREATE TABLE [Employee]([username] NVARCHAR(10))
INSERT [Employee]
SELECT N'张三' UNION ALL
SELECT N'李四' UNION ALL
SELECT N'王五'
GO
--SELECT * FROM [Employee]-->SQL查询如下:DECLARE @S VARCHAR(100)
SELECT @S=ISNULL(@S+',','')+[username] FROM [Employee]
PRINT @S
--RESULT:
--张三,李四,王五

请教各位大大？如何将
'01,02,03,04' 转换为1列的结果集
01
02
03
04

/* 拆分字符串
* */
--拆分单列+序号
--方法一：利用数字辅助表
if object_id('fn_SplitTSQL')is not null drop function  fn_SplitTSQL
GO
create FUNCTION dbo.fn_SplitTSQL(@s NVARCHAR(MAX), @split NCHAR(1)) RETURNS TABLE
AS
RETURNSELECTn - LEN(REPLACE(LEFT(array, n), @split, '')) + 1 AS rn,SUBSTRING(array, n,CHARINDEX(@split, array + @split, n) - n) AS colFROM (SELECT @s AS array) AS DJOIN dbo.NumsON n <= LEN(array)AND SUBSTRING(@split + array, n, 1) = @split;
GO--方法二：直接拆分
if object_id('f_split')is not null drop function  f_split
go
create function f_split
(
@s     varchar(8000),  --待分拆的字符串
@split varchar(10)     --数据分隔符
)returns table
asreturn(select Row_number()over(order by Number) rn ,substring(@s,number,charindex(@split,@s+@split,number)-number)as colfrom master..spt_valueswhere type='p' and number<=len(@s+'a') and charindex(@split,@split+@s,number)=number)
goselect * from dbo.f_split('11,2,3',',')
select * from dbo.fn_SplitTSQL('11,2,3',',')
GO--拆分多列
if object_id('fn_MutiSplitTSQL')is not null drop function  fn_MutiSplitTSQL
GO
create FUNCTION dbo.fn_MutiSplitTSQL  (@s NVARCHAR(MAX), @split NCHAR(1) ,@Sub@split NCHAR(1)= N',') RETURNS TABLE
AS
RETURNselect * from (SELECT d.rn ,'col'+ cast( n - LEN(REPLACE(LEFT(col, n), @Sub@split, '')) + 1 as varchar(10)) AS attribute,  SUBSTRING(col, n, CHARINDEX(@Sub@split, col + @Sub@split, n) - n) AS value  FROM (  SELECT  n - LEN(REPLACE(LEFT(array, n), @split, '')) + 1 AS rn,  SUBSTRING(array, n, CHARINDEX(@split, array + @split, n) - n) AS col  FROM (SELECT @s AS array) AS D  JOIN dbo.Nums a ON n <= LEN(array)  AND SUBSTRING(@split + array, n, 1) = @split ) AS D  JOIN dbo.Nums a ON n <= LEN(col)  AND SUBSTRING(@Sub@split + col, n, 1) = @Sub@split ) as dPIVOT(max(value) FOR attribute IN(col1,col2 ,col3,col4,col5 )) AS P
GOselect col1,col2,col3,col4from dbo.fn_MutiSplitTSQL('$092-1350,099201-080901,12050720,2012-6-11$092-0970,099204-072301,12050734,2012-6-11$','$',',')
GO