Database System Concepts
7th Edition
ISBN: 9789332901384
Author: Henry F. Korth & S. Sudarshan Abraham Silberschatz
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Expert Solution & Answer
Chapter 6, Problem 21E
Explanation of Solution
a.
Extended ER diagram after adding Blu-ray discs and downable video:
Explanation:
In the above ER diagram, the two entities “video”, and “blue_ray_disc” are added to the ER diagram given in the Figure 6.30.
- The “video” entity contains “name”, and “price” attributes. Here, “name” is a primary key...
Explanation of Solution
b.
Extended ER diagram using generalization:
Explanation:
- The common attributes of “book”, “video”...
Expert Solution & Answer
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Chapter 6 Solutions
Database System Concepts
Ch. 6 - Prob. 1PECh. 6 -
Consider a database that includes the entity sets...Ch. 6 -
Design an E-R diagram for keeping track of the...Ch. 6 - Prob. 4PECh. 6 - Prob. 5PECh. 6 - Prob. 6PECh. 6 - Prob. 7PECh. 6 -
Consider a relation such as sec_course, generated...Ch. 6 -
Suppose the advisor relationship set were...Ch. 6 - Prob. 10PE
Ch. 6 - Prob. 11PECh. 6 - Prob. 12PECh. 6 - Prob. 13PECh. 6 - Prob. 14ECh. 6 - Prob. 15ECh. 6 - Prob. 16ECh. 6 - Prob. 17ECh. 6 -
Consider two entity sets A and B that both have...Ch. 6 - Prob. 19ECh. 6 - Prob. 20ECh. 6 - Prob. 21ECh. 6 - Prob. 22ECh. 6 - Prob. 23ECh. 6 -
Design a database for an airline. The database...Ch. 6 - Prob. 25ECh. 6 -
Design a generalization – specialization...Ch. 6 -
Explain the distinction between disjoint and...Ch. 6 -
Explain the distinction between total and partial...
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