Relational databases hold data, right? They indeed do, but to think of a database as nothing more than a container for data is to miss out on the profound power that underlies relational technology. A far more powerful way of thinking lies in relational technologys foundation in the mathematical disciplines of logic and set theory.Databases contain truths or propositions describing some area of interest... 

Do you want the ability to manage documents, photos, and other content over the Web but dont want to shell out thousands of dollars in proprietary solutions? Want to create an online community for your hobby or user group? Youre not alone. For thousands of like-minded around the globe, the answer is Joomla!, an open source content management system used to manage all sorts of data over the Web.While...