String.Join in SQL

Question

i want to select from a Table called RMA(simplified):

 idRMA| RMA_Number
 -----------------------
 1      RMA0006701
 2      RMA0006730
 3               


        

Answer 1

Here is something that should get you going:

ALTER FUNCTION [dbo].[GetUCColumns]
(@tableid INT, @index INT)
RETURNS VARCHAR (MAX)
AS
BEGIN

    DECLARE @cols varchar(max)

    SELECT @cols = COALESCE(@cols + ', ', '') + [name]
    FROM [sys].[columns]
    where object_id = @tableid AND column_id IN 
    (SELECT [column_id]
      FROM [sys].[index_columns]
      where object_id = @tableid AND @index = index_id)

    RETURN @cols
    END