Feb 9, 2011

SQL Split Function

A SQL Split Function
This SQL function is similar to the VB split function. It takes a nvarchar delimeted list and delimeter and returns a table with the values split on delimeter.

if exists (select * from dbo.sysobjects where id =
object_id(N'[dbo].[UTILfn_Split]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[UTILfn_Split]
create function dbo.UTILfn_Split(
 @String nvarchar (4000),
 @Delimiter nvarchar (10)
returns @ValueTable table ([Value] nvarchar(4000))
 declare @NextString nvarchar(4000)
 declare @Pos int
 declare @NextPos int
 declare @CommaCheck nvarchar(1)

 set @NextString = ''
 set @CommaCheck = right(@String,1)

 --Check for trailing Comma, if not exists, INSERT
 --if (@CommaCheck <> @Delimiter )
 set @String = @String + @Delimiter

 --Get position of first Comma
 set @Pos = charindex(@Delimiter,@String)
 set @NextPos = 1

 --Loop while there is still a comma in the String of levels
 while (@pos <>  0) 
   set @NextString = substring(@String,1,@Pos - 1)
   insert into @ValueTable ( [Value]) Values (@NextString)
   set @String = substring(@String,@pos +1,len(@String))
   set @NextPos = @Pos
   set @pos  = charindex(@Delimiter,@String)

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