how to separate ID's in column

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its an hotel project., when user choose multi items for breakfast items from form i stored like 2,3,4,8 ., here 2 ,3 ,4, 8 are all ID's of item., now i want to separte these numbers to retrieve items.

in my database its store like

Table 1

menuitemsid|menuname
2,3,4,8 |Breakfast

Table 2

Itemid|item name
2 |Dosa
3 |Pizza
4 |Idly
5 |Muruku

i want output like

Breakfast
-------------
Dosa
Pizza
Idly
Muruku

Posted 17-Nov-12 0:38am

Umapathi K

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OriginalGriff · Answer 1 · 2012-11-17T00:57:00

That's a bit complex, because SQL server does not have a concept of arrays.
You will have to retrieve the string, and then break it into ID's and use that as part of an IN clause.
This procedure does something similar:

SQL

DECLARE @INSTR as VARCHAR(MAX)
SET @INSTR = '2,3,177,'
DECLARE @SEPERATOR as VARCHAR(1)
DECLARE @SP INT
DECLARE @VALUE VARCHAR(1000)
SET @SEPERATOR = ','
CREATE TABLE #tempTab (id int not null)
WHILE PATINDEX('%' + @SEPERATOR + '%', @INSTR ) <> 0
BEGIN
   SELECT  @SP = PATINDEX('%' + @SEPERATOR + '%',@INSTR)
   SELECT  @VALUE = LEFT(@INSTR , @SP - 1)
   SELECT  @INSTR = STUFF(@INSTR, 1, @SP, '')
   INSERT INTO #tempTab (id) VALUES (@VALUE)
END
SELECT * FROM myTable WHERE id IN (SELECT id FROM #tempTab)
DROP TABLE #tempTab

But you will have modify it to fit exactly what you want.

Shanalal Kasim · Answer 2 · 2012-11-17T23:08:00

Create Function for separating Ids.

SQL

CREATE FUNCTION [dbo].[String_Tokenizer]
(
	@RowData nvarchar(max),
	@SplitOn nvarchar(5)
)  
RETURNS @RtnValue table 
(
	Data nvarchar(100)
) 
AS  
BEGIN 
	Declare @Cnt int
	Set @Cnt = 1
 
	While (Charindex(@SplitOn,@RowData)>0)
	Begin
		Insert Into @RtnValue (data)
		Select 
			Data = ltrim(rtrim(Substring(@RowData,1,Charindex(@SplitOn,@RowData)-1)))
 
		Set @RowData = Substring(@RowData,Charindex(@SplitOn,@RowData)+1,len(@RowData))
		Set @Cnt = @Cnt + 1
	End
	
	Insert Into @RtnValue (data)
	Select Data = ltrim(rtrim(@RowData))
 
	Return
END

The above function will return a temporary table.

Sample code:

SQL

select * from [dbo].[String_Tokenizer]('1,2,3,4',',')

OutPut:

SQL

Data
1
2
3
4

how to separate ID's in column

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