Need a qry to join a comma separated column with a

Question

I have a table with

Table name TB1
mpeFromWHId mpeToStoreList
8            16,18,24

and Table tb2 are the codes of the comma separated storeid

nlid  nlcode
16     ncl
18     mcl
24     dcl

I need a query that will result in

col1   Col2
8      ncl,mcl,dcl

Answer 1

If you don't want to create a user function, you can do like this:

;with TB1(mpeFromWHId, mpeToStoreList) AS (
   select 8,'16,18,24'
)
SELECT t.mpeFromWHId,n.ID FROM (
      select *,convert(XML,'<n>'+replace(mpeToStoreList,',','</n><n>')+'</n>') as x from tb1 
) AS t
cross apply(select s.b.value('.','INT') as ID from t.x.nodes('n') s(b)) n

mpeFromWHId  ID

8   16
8   18
8   24

Answer 2

First you need a function to parse comma delimited string into table, you can use this (found [here])1:

CREATE FUNCTION [dbo].Split1(@input AS Varchar(4000) )
RETURNS
      @Result TABLE(Value BIGINT)
AS
BEGIN
      DECLARE @str VARCHAR(20)
      DECLARE @ind Int

      IF(@input is not null)
      BEGIN
            SET @ind = CharIndex(',',@input)
            WHILE @ind > 0
            BEGIN
                  SET @str = SUBSTRING(@input,1,@ind-1)
                  SET @input = SUBSTRING(@input,@ind+1,LEN(@input)-@ind)
                  INSERT INTO @Result values (@str)
                  SET @ind = CharIndex(',',@input)
            END
            SET @str = @input
            INSERT INTO @Result values (@str)
      END
      RETURN
END 

Then you can use something like this (but there are many more options off course):

declare @searchId int
set @searchId = 8

declare @tb1 table (mpeFromWHId int, mpeToStoreList varchar(100))
insert into @tb1
select 8, '16,18,24'

declare @tb2 table (nlid int, nlcode varchar(30))
insert into @tb2
select 16, 'ncl' union
select 18, 'mcl' union
select 24, 'dcl'

select stuff((
    select ',' + nlcode
    from @tb2
    where nlid in (
        select Value 
        from dbo.Split1((select mpeToStoreList from @tb1 where mpeFromWHId = @searchId))
    )
    order by nlcode
    for xml path(''), type
).value('(./text())[1]','varchar(max)'), 1, 2, '')