I want to learn how to use the MySQL database. Where I can find more information?
There is a very good tutorial of MySQL located on their own site. Please read it for more details. The tutorial is located here: http://www.mysql.com/documentation/mysql/bychapter/manual_Tutorial.html
.How to get more space for my database?
The default SQl database space is 1 MB.
You can add additional space from your web control panel.
Log in to your account and select 'Manage SQL DataBases'. A page will open with all SQL DB listed.
At the top of the page you will see a 'Add/Remove SQL Space' link. Select it to edit the amount of MBites you'd like to use for your databases.How to get another MySQL database for my account?
In the Control Panel there is an 'Add SQL DataBase'. There is daily fee for each additional database you use over the allowed number of databases in your hosting plan.