SQL Server字符串切割函数

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我是靠谱客的博主柔弱书本，这篇文章主要介绍SQL Server字符串切割函数，现在分享给大家，希望可以做个参考。

复制代码代码如下:

 
CREATE FUNCTION fGetStrBySplit 
( 
@Source VARCHAR(max), 
@Index INT, 
@SplitChar VARCHAR(1) 
) 
RETURNS varchar(MAX) 
AS 
BEGIN 

DECLARE @Len INT 
DECLARE @n INT = 0 
DECLARE @ChIndex INT 
DECLARE @Result VARCHAR(MAX) 
--获取总长度 
SET @Len = LEN(@Source) 
--获取切割字符位置 
SET @ChIndex = CHARINDEX(@SplitChar,@Source) 

WHILE @ChIndex > 0 
BEGIN 
IF(@n = @Index) 
BEGIN 
SET @Source = SUBSTRING(@Source,0,@ChIndex) 
BREAK 
END 

SET @Source = SUBSTRING(@Source,@ChIndex+1,@Len) 
SET @ChIndex = CHARINDEX(@SplitChar,@Source) 

SET @Len = LEN(@Source) 
SET @n = @n + 1 

END 

RETURN @Source 
END 
GO 

--调用 
DECLARE @value VARCHAR(max) 
SET @value = dbo.fGetStrBySplit('645002*01_45854_183677_12',0,'_') 
PRINT @value 