Removing last comma in SELECT statement

Question

I have a select query which looks like this:

SELECT 
ROW_NUMBER() OVER (ORDER BY T.TitleId) as Row, 
T.TitleId as TitleID, 
T.TitleSort as TitleName, 
TT.Description as TitleType, 
TS.Description as TitleOrigin,
--get genres
(select Genre.Description + ', ' from Genre where GenreId IN
(Select GenreId from TitleGenre WHERE TitleId = T.TitleId)
group by Genre.Description for xml path('')) AS Genres, ....

This code works, but I can't find a way to get rid of the last comma. This is how the returned row looks:

Action, Drama, Romance, 

I need to get rid of last comma without using a function or declaring a variable, right here in the query. Is that possible? Thanks in advance for your answers.

Answer 1

Something like this should be close -- basically move the comma to the beginning and then remove it with STUFF:

STUFF(
        (
        select ', ' + Genre.Description from Genre where GenreId IN
(Select GenreId from TitleGenre WHERE TitleId = T.TitleId)
group by Genre.Description for xml path('')
        ), 1, 2, '') 

Good luck.

Answer 2

You can always use the following which uses Left() and Len():

select *,
  left(Genres, len(Genres)-1) as Genres
from 
(
  SELECT 
  ROW_NUMBER() OVER (ORDER BY T.TitleId) as Row, 
  T.TitleId as TitleID, 
  T.TitleSort as TitleName, 
  TT.Description as TitleType, 
  TS.Description as TitleOrigin,
  --get genres
  (select Genre.Description + ', ' from Genre where GenreId IN
  (Select GenreId from TitleGenre WHERE TitleId = T.TitleId)
  group by Genre.Description for xml path('')) AS Genres, ....
) src