This book introduces the fundamental concepts necessary for designing, using, and implementing database systems and database applications. Our presentation stresses the fundamentals of database modeling and design, the languages and models provided by the database management systems, and database system implementation techniques. The book is meant to be used as a textbook for a one- or two-semester course in database systems at the junior,senior,or graduate level,and as a reference book. Our goal is to provide an in-depth and up-to-date presentation of the most important aspects of database systems and applications, and related technologies. We assume that readers are familiar with elementary programming and datastructuring concepts and that they have had some exposure to the basics of computer organization.

New to This Edition The following key features have been added in the sixth edition: 


  • A reorganization of the chapter ordering to allow instructors to start with projects and laboratory exercises very early in the course
  • The material on SQL,the relational database standard,has been moved early in the book to Chapters 4 and 5 to allow instructors to focus on this important topic at the beginning of a course
  • The material on object-relational and object-oriented databases has been updated to conform to the latest SQL and ODMG standards, and consolidated into a single chapter (Chapter 11) 
  • The presentation of XML has been expanded and updated, and moved earlier in the book to Chapter 12 
  • The chapters on normalization theory have been reorganized so that the first chapter (Chapter 15) focuses on intuitive normalization concepts, while the second chapter (Chapter 16) focuses on the formal theories and normalization algorithms 
  • The presentation of database security threats has been updated with a discussion on SQL injection attacks and prevention techniques in Chapter 24, and an overview of label-based security with examples





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