Passing comma-separated value from .NET to stored procedure using the value in “IN” SQL function

Question

I have an SQL query similar to the following:

create procedure test
(
   @param1 nvarchar(max)
)
as
begin
    select * from table where column1 in (@param1)
         


        

Answer 1

For this type of thing, I use this function and use it as follows:

select Column1, column2 from my table where ID in (select item from fnSplit('1,2,3,4,5,6',','))

create FUNCTION [dbo].[fnSplit](
        @sInputList VARCHAR(8000) -- List of delimited items
      , @sDelimiter VARCHAR(8000) = ',' -- delimiter that separates items
    ) 

RETURNS @List TABLE (item VARCHAR(8000))

BEGIN
DECLARE @sItem VARCHAR(8000)
WHILE CHARINDEX(@sDelimiter,@sInputList,0) <> 0
 BEGIN
 SELECT
  @sItem=RTRIM(LTRIM(SUBSTRING(@sInputList,1,CHARINDEX(@sDelimiter,@sInputList,0)-1))),
  @sInputList=RTRIM(LTRIM(SUBSTRING(@sInputList,CHARINDEX(@sDelimiter,@sInputList,0)+LEN(@sDelimiter),LEN(@sInputList))))

 IF LEN(@sItem) > 0
  INSERT INTO @List SELECT @sItem
 END

IF LEN(@sInputList) > 0
 INSERT INTO @List SELECT @sInputList -- Put the last item in
RETURN
END