On the Builder.com.au site today, there's an introduction posted to walk you through one of the most popular web-based database administration tools for PHP/MySQL on the web, phpMyAdmin.
phpMyAdmin is a HTML interface developed in PHP, for creating and managing MySQL databases. Before you download and install the latest version, have a look at the requirements section on the phpMyAdmin Wiki.
They look at the overall interface, how to set up users, making a new database, creating a table inside of it, pushing data into the table and the various options that the tool has to help you manage your database(s) - all with nice big screenshots to show you where it all is.