Multiple While Fetch Cursor Code

I seem to have a few problems with the below double cursor procedure. Probably due to the fact that I have two while loops based on fetch status. Or???

What I want to do is select out a series of numbers in medlemmer_cursor(currently set to only one number, for which I know I get results) and for each of these numbers select their MCPS code and gather these in a single string.

For some reason the outpiut (the insert into statement) returns the correct number 9611 but the second variable @instrumentlinje remains empty.

If I test the select clause for 9611, it gets 4 lines. So to me its like the "SELECT @instrumentlinje = @instrumentlinje + ' ' + @instrument" statement doesn't execute.





DELETE FROM ALL_tbl_instrumentkoder

DECLARE @medlem int
DECLARE @instrument varchar(10)
DECLARE @instrumentlinje varchar(150)

DECLARE medlemmer_cursor CURSOR FOR
SELECT medlemsnummer
FROM ket.ALL_tbl_medlemsinfo (NOLOCK)
WHERE medlemsnummer = 9611

DECLARE instrumenter_cursor CURSOR FOR
SELECT [MCPS Kode]
FROM Gramex_DW.dbo.Instrumentlinie (NOLOCK)
WHERE Medlemsnummer = @medlem

OPEN medlemmer_cursor

FETCH NEXT FROM medlemmer_cursor INTO @medlem

WHILE @@FETCH_STATUS = 0
BEGIN

OPEN instrumenter_cursor
FETCH NEXT FROM instrumenter_cursor INTO @instrument

WHILE @@FETCH_STATUS = 0
BEGIN
SELECT @instrumentlinje = @instrumentlinje + ' ' + @instrument
FETCH NEXT FROM instrumenter_cursor INTO @instrument
END

CLOSE instrumenter_cursor

INSERT INTO ALL_tbl_instrumentkoder VALUES(@medlem, @instrumentlinje)

FETCH NEXT FROM medlemmer_cursor INTO @medlem

END

CLOSE medlemmer_cursor
DEALLOCATE medlemmer_cursor
DEALLOCATE instrumenter_cursor