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Featured Database Articles

SQL Scripts & Samples

Posted Mar 12, 2004

Convert String to Table/Array Script

By DatabaseJournal.com Staff


This function splits a string by a specified delimiter and returns the separated values as a table or array. The default separator is the pipe (|) symbol.

Author: R. Rasu



/****** Object:  User Defined Function dbo.fn_SplitIn2Rows    
Script Date: 8/10/2002 6:43:52 PM ******/
CREATE FUNCTION fn_SplitIn2Rows
    (
	  @PInStrSource varchar(8000) = NULL, 
      @pInChrSeparator char(1) = '|'
	)
	RETURNS 
		@ARRAY TABLE (ItemValue VARCHAR(1000))
AS
BEGIN
	DECLARE @CurrentStr varchar(2000)
	DECLARE @ItemStr varchar(200)
	
	SET @CurrentStr = @PInStrSource
	 
	WHILE Datalength(@CurrentStr) > 0
	BEGIN
		IF CHARINDEX(@pInChrSeparator, @CurrentStr,1) > 0 
			BEGIN
	           	SET @ItemStr = SUBSTRING (@CurrentStr, 1, CHARINDEX(@pInChrSeparator, @CurrentStr,1) - 1)
	            SET @CurrentStr = SUBSTRING (@CurrentStr, CHARINDEX(@pInChrSeparator, @CurrentStr,1) + 1, (Datalength(@CurrentStr) - CHARINDEX(@pInChrSeparator, @CurrentStr,1) + 1))
				INSERT @ARRAY (ItemValue) VALUES (@ItemStr)
	   		END
		 ELSE
		 	BEGIN                
				INSERT @ARRAY (ItemValue) VALUES (@CurrentStr)	 		
	           	BREAK;
	       	 END 
	END
	RETURN
END

--THE USAGE: 
--SELECT * FROM Stores WHERE
--		StoreId IN 
--		(
--			SELECT ItemValue FROM fn_SplitIn2Rows('44|23|11|4|89|21', '|')
--		)

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