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Tip of the Day
Language: SQL
Expertise: Intermediate
Jan 26, 2004

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


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]
GO
 
create function dbo.UTILfn_Split(
 @String nvarchar (4000),
 @Delimiter nvarchar (10)
 )
returns @ValueTable table ([Value] nvarchar(4000))
begin
 declare @NextString nvarchar(4000)
 declare @Pos int
 declare @NextPos int
 declare @CommaCheck nvarchar(1)
 
 --Initialize
 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)  
 begin
  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)
 end
 
 return
end
Martin Naude
 
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