Database Modeling & Design Fourth Edition- P2 ppsx

Database Modeling
& Design:
Logical Design
Fourth Edition
TOBY TEOREY
SAM LIGHTSTONE
TOM NADEAU
AMSTERDAM • BOSTON • HEIDELBERG • LONDON
NEW YORK • OXFORD • PARIS • SAN DIEGO
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MORGAN KAUFMANN PUBLISHERS IS AN IMPRINT OF ELSEVIER
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To Matt, Carol, and Marilyn
(Toby Teorey)
To my wife and children, Elisheva, Hodaya, and Avishai
(Sam Lightstone)
To Carol, Paula, Mike, and Lagi
(Tom Nadeau)
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ix
Contents
Preface xv
Chapter 1
Introduction 1
1.1 Data and Database Management 2

1.2 The Database Life Cycle 3
1.3 Conceptual Data Modeling 8
1.4 Summary 11
1.5 Literature Summary 11
Chapter 2
The Entity-Relationship Model 13
2.1 Fundamental ER Constructs 13
2.1.1 Basic Objects: Entities, Relationships, Attributes 13
2.1.2 Degree of a Relationship 16
2.1.3 Connectivity of a Relationship 18
2.1.4 Attributes of a Relationship 19
2.1.5 Existence of an Entity in a Relationship 19
2.1.6 Alternative Conceptual Data Modeling Notations 20
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