To use MySQL on the DS209 it must be enabled. It is actually preinstalled and must only be activated in the WebServices Tab of the DiskStation Manager.
I want to use MySQL and PHP (which i will introduce later) on my DS209, so the settings looks like this:
To manage the sql-database I use phpMyAdmin, which is not preinstalled, but is is possible to download a package with phpMyAdmin from the Synology Website, which can be easily installed on the DS209.
With the MySQL Admin tool i created a database called 'bong.tv' and a table 'content'. I also created a user 'remote' with all rights to the database.