Database Management Systems is designed for use in a course in databases. This book is distinctive in its emphasis on the practical side of databases. This means that it has unique coverage of database design, uses SQL throughout the book to demonstrate different concepts, and has an emphasis on query evaluation and optimization. In this revision the author has moved coverage of the ER model earlier in the book. Additionally, he has added chapters on Internet Databases, Decision Support, Data Mining, Object-Relational Databases, Spatial Databases and Deductive and Active Databases. Database Management Systems is accompanied by a website that includes solutions, presentation materials, practical SQL assignments, the minibase software and helpful lecture tips.