Principles of Database Systems  (English, Paperback, Ullman Jeffrey D.)

In recent years an extensive body of theory and general principles related to database systems has been developed. For the first time a comprehensive treatment of this material is now offered. Descriptions of actual data-base systems and query languages such as ISBL, QUEL, Query-by-Example, SEQUEL are also included, making this book ideal for both practicing computer scientists and for database courses. Security and con-currency are covered in separate chapters.