Hello!
If you attempt to pass the MySql certification tests, then check the link below!
http://www.mysql.com/certification/candguide.html
In my experience you get the practical knowledge needed for the tests quite quickly by just using MySql every day. For the theoretical background however you need to study.
I got my certifications about a hundred years ago. In preparation I visited a course. At the course I actually got vouchers for the tests and the study guide. Shortly after that I passed the certificaton tests.
So, if you are serious about MySql certifications, get the study guide. A MySql course will help you save you time on perparations. And maybe even testing your knowledge with the questions on this page will help you on the way…