On SpeckBoy.com there's a new tutorial posted that introduces you to the concept of CRUD - Create, Read, Update, Delete - in the database interface for your application. Technically CRUD can be applied to any sort of data store, but they chose to go with a MySQL-based example.

It has become a common necessity for website owners to collect data and manage it properly. Creating a MySQL CRUD class allows you to conveniently create, read, update and delete entries for any of your projects, indifferent of how the database is devised. CRUD allows us to generate pages to list and edit database records. So, in this tutorial I will show you how to build a simple CRUD web app, that will empower you with the basic functions of database management.

They briefly walk you through the setup of a XAMPP server to use as a base and give you the settings needed to create a simple users table. The rest of the post is the code you'll need to make the connection from your PHP script, insert data into the table, update them, remove the rows and display their contents. They've wrapped it all up in a single "index.php" file to make it simpler.