Question

im not sure if what I am asking for is possible… but it probably is lol.

Basically, I have two tables, tracks and albums.

I want to display a list of all tracks and get the name from the albums part.

The tables look like this:

tbl_tracks
id - int, auto increment, primary key
album_id - int
title - varchar 50

and

tbl_albums
id - int, auto increment, primary key
title - varchar 50

Now, i run the query:

SELECT tbl_tracks.title, tbl_albums.title FROM tbl_tracks, tbl_albums WHERE tbl_tracks.album_id = tbl_albums.id GROUP BY tbl_tracks.title

Now that prints out the following list:

Track1 Artist1
Track2 Artist1
Track3 Artist1
Track1 Artist2

etc..etc..

(The track names arnt as posted i did that for clarity sake)

Now what i want to do is select another column that numbers each track by artist so the above query would output:

1 Track1 Artist1
2 Track2 Artist1
3 Track3 Artist1
1 Track1 Artist2

But i want to do that without any other columns added to the database or without any serverside loops, how would i do this?

Answer 1

SELECT @rn := if(@g = tbl_albums.id, @rn+1, 1) rownumber,
       tbl_tracks.title, tbl_albums.title,
  @g := tbl_albums.id
FROM (select @g:=null, @rn:=0) initvars
CROSS JOIN tbl_tracks
INNER JOIN tbl_albums on tbl_tracks.album_id = tbl_albums.id
ORDER BY tbl_albums.id, tbl_tracks.title;