您应该看到："Arrays and Lists in SQL Server 2005 and Beyond, When Table Value Parameters Do Not Cut it" by Erland Sommarskog，然后有很多方法可以在SQL Server中拆分字符串。本文涵盖了几乎所有方法的PRO和CON。一般来说，你需要创建一个分割函数。这是一个分裂的功能如何被用于加入行：
SELECT
*
FROM dbo.yourSplitFunction(@Parameter) b
INNER JOIN YourCodesTable c ON b.ListValue=c.CodeValue
I prefer the number table approach to split a string in TSQL但也有许多方法来拆分在SQL Server中的字符串，见前面的链接，这说明各的优点和缺点。
对于数字表的方法来工作，你需要做的这一次表的设置，这将创建一个包含从1到10000行的表Numbers：
SELECT TOP 10000 IDENTITY(int,1,1) AS Number
INTO Numbers
FROM sys.objects s1
CROSS JOIN sys.objects s2
ALTER TABLE Numbers ADD CONSTRAINT PK_Numbers PRIMARY KEY CLUSTERED (Number)
一旦Numbers表格设置，创建此分割功能：
CREATE FUNCTION [dbo].[FN_ListToTable]
(
@SplitOn char(1) --REQUIRED, the character to split the @List string on
,@List varchar(8000)--REQUIRED, the list to split apart
)
RETURNS TABLE
AS
RETURN
(
----------------
--SINGLE QUERY-- --this will not return empty rows
----------------
SELECT
ListValue
FROM (SELECT
LTRIM(RTRIM(SUBSTRING(List2, number+1, CHARINDEX(@SplitOn, List2, number+1)-number - 1))) AS ListValue
FROM (
SELECT @SplitOn + @List + @SplitOn AS List2
) AS dt
INNER JOIN Numbers n ON n.Number < LEN(dt.List2)
WHERE SUBSTRING(List2, number, 1) = @SplitOn
) dt2
WHERE ListValue IS NOT NULL AND ListValue!=''
);
GO
您现在可以轻松地拆分CSV字符串转换成表格，并加入就可以了：
DECLARE @ErrorCode table (ErrorCode varchar(20), Description varchar(30))
INSERT @ErrorCode VALUES ('001','Problem with person file')
INSERT @ErrorCode VALUES ('002','Problem with address file')
INSERT @ErrorCode VALUES ('003','Problem with grade')
DECLARE @Person table (RecID int, ErrorCode varchar(20))
INSERT @Person VALUES (12345 ,'001' )
INSERT @Person VALUES (12346 ,'003' )
INSERT @Person VALUES (12347 ,'002,003')
SELECT
p.RecID,c.ListValue,e.Description
FROM @Person p
CROSS APPLY dbo.FN_ListToTable(',',p.ErrorCode) c
INNER JOIN @ErrorCode e ON c.ListValue=e.ErrorCode
OUTPUT：
RecID ListValue Description
----------- ------------- -------------------------
12345 001 Problem with person file
12346 003 Problem with grade
12347 002 Problem with address file
12347 003 Problem with grade
(4 row(s) affected)
可以使用XML招行串连到一起：
SELECT
t1.RecID,t1.ErrorCode
,STUFF(
(SELECT
', ' + e.Description
FROM @Person p
CROSS APPLY dbo.FN_ListToTable(',',p.ErrorCode) c
INNER JOIN @ErrorCode e ON c.ListValue=e.ErrorCode
WHERE t1.RecID=p.RecID
ORDER BY p.ErrorCode
FOR XML PATH(''), TYPE
).value('.','varchar(max)')
,1,2, ''
) AS ChildValues
FROM @Person t1
GROUP BY t1.RecID,t1.ErrorCode
OUTPUT：
RecID ErrorCode ChildValues
----------- -------------------- -----------------------------------------------
12345 001 Problem with person file
12346 003 Problem with grade
12347 002,003 Problem with address file, Problem with grade
(3 row(s) affected)
这将返回相同的结果如上设置，但可能表现更好：
SELECT
t1.RecID,t1.ErrorCode
,STUFF(
(SELECT
', ' + e.Description
FROM (SELECT ListValue FROM dbo.FN_ListToTable(',',t1.ErrorCode)) c
INNER JOIN @ErrorCode e ON c.ListValue=e.ErrorCode
ORDER BY c.ListValue
FOR XML PATH(''), TYPE
).value('.','varchar(max)')
,1,2, ''
) AS ChildValues
FROM @Person t1
GROUP BY t1.RecID,t1.ErrorCode
SQL Server没有GROUP_CONCAT。 – 2010-11-04 15:27:16
GROUP_CONCAT不是SQL Server中的关键字。你可能会想到MySQL（？） – 2010-11-04 15:27:58