Copyright © 2004 Pearson Education, Inc.
Copyright © 2004 Pearson Education, Inc.. Chapter 3 Data Modeling Using the Entity-Relationship Model.
Dec 21, 2015
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Copyright © 2004 Pearson Education, Inc.
Copyright © 2004 Pearson Education, Inc.
Chapter 3
Data Modeling Using the Entity-Relationship
Model
Slide 3-3Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.1A simplified diagram to illustrate the main phases of database design.
Slide 3-4Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.2An ER schema diagram for the COMPANY database.
Slide 3-5Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.3Two entities, employee e1 and company c1, and their attributes.
Slide 3-6Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.4A hierarchy of composite attributes.
Slide 3-7Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.5A complex attribute: AddressPhone.
Slide 3-8Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.6Two entity types, EMPLOYEE and COMPANY, and some member entities of each.
Slide 3-9Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.7The CAR entity type with two key attributes, Registration and VehicleID.
Slide 3-10Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.8Preliminary design of entity types for the COMPANY database.
Slide 3-11Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.9Some instances in the WORKS_FOR relationship set, which represents a relationship type WORKS_FOR between EMPLOYEE and DEPARTMENT.
Slide 3-12Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.10Some relationship instances in the SUPPLY ternary relationship set.
Slide 3-13Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.11A recursive relationship SUPERVISION between EMPLOYEE in the supervisor role (1) and EMPLOYEE in the subordinate role (2).
Slide 3-14Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.12A 1:1 relationship, MANAGES.
Slide 3-15Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.13An M:N relationship, WORKS_ON.
Slide 3-16Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.14Summary of the notation for ER diagrams.
Slide 3-17Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.15ER diagrams for the COMPANY schema, with structural constraints specific using (min, max) notation.
Slide 3-18Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.16The COMPANY conceptual scheme in UML class diagram notation.
Slide 3-19Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.17An ER diagram for an AIRLINE database schema.
Slide 3-20Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.18An ER diagram for a BANK database schema.
Slide 3-21Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.19Part of an ER diagram for a COMPANY database.
Slide 3-22Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition
Copyright © 2004 Pearson Education, Inc.
FIGURE 3.20Part of an ER diagram for a COURSES database.
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