MySQL udtræk med automatiske linienumre

mysql> select lecture,title,@i:=@i+1 as iterator from opgaver,(select @i:=0) foo where lecture=11 order by `order`;
+---------+---------------------+----------+
| lecture | title               | iterator |
+---------+---------------------+----------+
|      11 | Gruppens opst?en    |        1 | 
|      11 | Favoritemne         |        2 | 
|      11 | Indspilningsstudier |        3 | 
|      11 | Antal medlemmer     |        4 | 
+---------+---------------------+----------+
4 rows in set (0.02 sec)