Synopsis This is a systematic study of Database Management system. Actually databases are essential ingredients of modern computing systems. Although database concepts, technology and architectures have been developed and consolidated in the last decades, many aspects are subject to technological evolution and revolution. This book provides a new and comprehensive treatment of databases, dealing with the complete syllabuses for both an introductory course and an advanced course on databases. It offers a balanced view of concepts, languages and architectures, with concrete reference to current technology and to commercial database management systems (DBMSs). It is designed to expose the fundamental aspects of designing and manipulating a database that are required in order to make effective use of database technology. The book is devoted to the current trends focusing on object-oriented databases, active databases, data warehouses and the interaction between databases and the world Wide Web.