Data Base Step-by-step - Tapa dura

The field of database management has undergone many significant changes in the recent past. Developments in fourth generation languages, database query languages and new methods of designing relational databases are the topics discussed in this newly revised second edition. The book stresses the fundamental principles and historical origins of database design and development. It covers the four major database systems approaches: hierarchical, network, relational, and pseudorelational and their applications. Over fifty percent of the material included is new, with many current examples of real-world applications. The text has been designed for database administrators, systems analysts, information systems managers, programmers and students.