from time to time there seems to be some confusion about these topics, even if they fulfil totally different tasks:
mAirListDB is a database to manage playout items and their metadata. (Audios per se are located at a different site to which mAirListDB is setting the correlation to.) For this purpose mAirList offers her own SQL_lite server, which is restricted to local operation, however. Network based databases employing an SQL server can be operated as well.
mAirListDB Server is a feature which makes the SQL database accessible over the Intenet, for use by remote clients.
The local SQL_lite database comes with every edition of mAirList, networked database and mAirListDB Server are reserved to higher editions.