Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Chapter 4, Problem 11C

Explanation of Solution

Entity Relational (ER) Diagram:

The following figure illustrates the ER Diagram for given business rules in Crow’s Foot notation:

Explanation:

From the above The Tiny College (TFBS Maintenance) ERD contains entities such as “LOG”, “VECHICLE”, “LOG_LINE”, “ACTION”, “MECHANIC”, “PART”, “EMPLOYEE” and “LOG_OUT”.

  • The relationship between the “VECHICLE” and “LOG” entities is 1: M. It is a weak relationship because the VECHICLE’s PK is included as FK in LOG entity...

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