
DATABASE SYSTEMS
13th Edition
ISBN: 9780357095607
Author: Coronel
Publisher: CENGAGE L
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Chapter 2, Problem 16P
(a)
Explanation of Solution
The business rules for the MegaCo Corporation’s divisions are as follows:
- Each department has many employees but each employee works for only one department.
- Each department is managed by one employee and each employee can manage only one department at a time.
Crow’s Foot ERD:
(b)
Explanation of Solution
The business rules can be written as follows.
- A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.
Crow’s Foot ERD:
(c)
Explanation of Solution
The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.
Crow’s Foot ERD:
(d)
Explanation of Solution
The business rule for “KwikTite” Corporation is as follows.
- Each factory is located in a region and each region can be a home for many factories.
- Each factory employs many employees but each employee is employed by only one factory.
Crow’s Foot ERD:
(e)
Explanation of Solution
The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.
Crow’s Foot ERD:
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Chapter 2 Solutions
DATABASE SYSTEMS
Ch. 2 - Prob. 1RQCh. 2 - What is a business rule, and what is its purpose...Ch. 2 - How do you translate business rules into data...Ch. 2 - Prob. 4RQCh. 2 - Explain how the entity relationship (ER) model...Ch. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - Prob. 8RQCh. 2 - Prob. 9RQCh. 2 - Prob. 10RQ
Ch. 2 - What is a relationship, and what three types of...Ch. 2 - Give an example of each of the three types of...Ch. 2 - What is a table, and what role does it play in the...Ch. 2 - Prob. 14RQCh. 2 - Prob. 15RQCh. 2 - Prob. 16RQCh. 2 - Prob. 17RQCh. 2 - Prob. 18RQCh. 2 - Prob. 19RQCh. 2 - Prob. 21RQCh. 2 - Prob. 22RQCh. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Using Figure P2.6 as your guide, work Problems 68....Ch. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Typically, a hospital patient receives medications...Ch. 2 - Prob. 10PCh. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17P
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