SQL use comma-separated values with IN clause

Question

I am developing an ASP.NET application and passing a string value like \"1,2,3,4\" into a procedure to select those values which are IN (1,2,3,4) but its saying \"Conversion

Answer 1

If you dont want to use dynamic sql, the best way ive found is to create a function which turns a delimited string into a table, something like this works for an Integer list:

CREATE FUNCTION [dbo].[StringToIntList]
(@str VARCHAR (MAX), @delimeter CHAR (1))
RETURNS 
    @result TABLE (
        [ID] INT NULL)
AS
BEGIN

    DECLARE @x XML 
    SET @x = '' + REPLACE(@str, @delimeter, '') + ''

    INSERT INTO @result
    SELECT DISTINCT x.i.value('.', 'int') AS token
    FROM @x.nodes('//t') x(i)
    ORDER BY 1

RETURN
END

Then use that in your sp:

CREATE Procedure [dbo].[sp_getUserRoles](
   @pGroupIDs varchar(50)
    )
     As
    BEGIN
        SELECT * FROM CheckList_Groups Where id in (
           SELECT ID FROM dbo.StringToIntList(@pGroupIds,',')
       )
   End