create function F5(
	@status varchar(200),
	@sektor int
)
returns varchar(200)
as
begin
declare @str varchar(1000)

SELECT @str= coalesce(@str + ', ', '') + a.nextstatus
FROM (SELECT DISTINCT nextstatus from krstatuspart_nextstatus where status=@status and sektor = @sektor) a

return @str
end

select dbo.F5('PR',9)