Want to learn MySQL? Have an hour or so? Go to Oracle's Learning Explorer and sign up for the FREE MySQL Explorer learning path. It begins with an overview of MySQL, discusses the client/server model, and then leads you through the use of MySQL. You do not need previous MySQL or database experience.
MySQL is the most-used opensource database and over the years I have has requests for introductory materials. Well, now I can send them to the MySQL Explorer for some web based training. And you can earn the explorer badge when you pass the end of class quiz.