00816nam a2200193Ia 4500 CTU_232453 210402s9999 xx 000 0 und d 001.64 U42 Ullman, Jeffrey D. Principles of database systems Jeffrey D. Ullman Rockville, Md. Computer Science Press 1982 The comprehensive treatment of the theory and general principles relevant to database systems, as well as the many examples, exercises, and bibliographic notes included in each chapter, should make this book useful for database courses and for practising computer scientists. Hệ thống dữ liệu,Database systems dqhieu Trung tâm Học liệu Trường Đại học Cần Thơ