The assigned space is the sum of the space of 5 preconfigured databases without restriction on the quantity of usable space for each db. All the combinations, which have the sum equal to the purchased space (1GB, 2GB etc), are valid and divided in an automatic way.
To every MySql space there are 5 databases assigned automatically and it is not possible to add any others or to rename those with different names to the ones that are preconfigured.
The name of the assigned databases is structured like this:
loginmysql followed by _ and a number from 1 to 5.
Attention: the S is a capital letter like in the login.