This book presents the conceptual principles underlying the design and implementation of databases and their applications by providing a solid foundation of the theory underlying database systems.This book takes an applications-oriented approach to database concepts and covers topics including; ER Modeling, UML, XML, object-oriented databases, SQL, database tuning, and the important software issues that arise when implementing database applications.This book is appropriate for programmers who want to understand database system concepts and how they apply to real-world databases.