MariaDB [teeworlds]> select Server, avg(Time) / 60 as "Average Minutes" from (select record_race.Map, Name, record_maps.Server, Time from record_race join record_maps on record_race.Map = record_maps.Map group by record_race.Map, Name having record_race.Map != "FlappyBird") as l group by Server;
+-----------+--------------------+
| Server | Average Minutes |
+-----------+--------------------+
| Brutal | 59.36620118173801 |
| DDmaX | 23.43948399153775 |
| Dummy | 17.590464463331536 |
| Insane | 188.55002648333266 |
| Moderate | 29.932537271577797 |
| Novice | 17.078059323146938 |
| Oldschool | 34.291567234613225 |
| Race | 5.824250927334815 |
| Solo | 16.66852877194431 |
+-----------+--------------------+
9 rows in set (7 min 34.94 sec)