把字符串解析为表(table)的SQL语句

下面的用户自定义函数(UDF)能把字符串解析为表(table).它也支持自定义分隔符.下面的脚本在SQL SERVER 2005下写的.该脚本也支持TEXT字段.如果你想在SQL SERVER 2000下是使用,请把VARCHAR(MAX) 替换为 VARCHAR(8000).

 CREATE FUNCTION dbo.udf_List2Table
 (
 @List VARCHAR(MAX),
 @Delim CHAR
 )
 RETURNS
 @ParsedList TABLE
 (
 item VARCHAR(MAX)
 )
 AS
 BEGIN
 DECLARE @item VARCHAR(MAX), @Pos INT
 SET @List = LTRIM(RTRIM(@List))+ @Delim
 SET @Pos = CHARINDEX(@Delim, @List, 1)
 WHILE @Pos > 0
 BEGIN
 SET @item = LTRIM(RTRIM(LEFT(@List, @Pos - 1)))
 IF @item <> ''
 BEGIN
 INSERT INTO @ParsedList (item)
 VALUES (CAST(@item AS VARCHAR(MAX)))
 END
 SET @List = RIGHT(@List, LEN(@List) - @Pos)
 SET @Pos = CHARINDEX(@Delim, @List, 1)
 END
 RETURN
 END
 GO

示例1:

 SELECT item AS Example1
 FROM dbo.udf_List2Table('first||2nd||III||1+1+1+1','||')

结果:

 first
 2nd
 III
 1+1+1+1

示例2:

 SELECT CAST(item AS INT) AS Example2
 FROM dbo.udf_List2Table('111,222,333,444,555',',')
 GO

结果:

 111
 222
 333
 444
 555

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