Database Systems: Design, Implementation, & Management
13th Edition
ISBN: 9780357155868
Author: Carlos Coronel; Steven Morris
Publisher: Cengage Learning US
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Expert Solution & Answer
Chapter 4, Problem 10P
a.
Explanation of Solution
Crow’s Foot ER diagram for first LOST:
The following data model shows the solution for the given question.
Explanation:
- In the above data model, “Tour” table contains details of the tour and the “Tour” can have many “Qualification” which equally “Guide” can works in many “Qualification”. Here the M:N relationship is break into two 1:N relationship. The “Qualification” is a bridge between “Tour” and “Guide” table.
- The “Stop” table contains details of the stop and one “Tour” can have many stopping place so 1:N relationship...
b.
Explanation of Solution
Crow’s Foot ER diagram for second LOST:
The following data model shows the solution for the given question.
Explanation:
- In the above data model, “Tour” table contains details of the tour and the “Tour” can have many “Qualification” which equally “Guide” can works in many “Qualification”. Here the M:N relationship is break into two 1:N relationship. The “Qualification” is a bridge between “Tour” and “Guide” table...
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Chapter 4 Solutions
Database Systems: Design, Implementation, & Management
Ch. 4 - Prob. 1RQCh. 4 - What is a strong (or identifying) relationship,...Ch. 4 - Prob. 4RQCh. 4 - Suppose you are working within the framework of...Ch. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Discuss the difference between a composite key and...Ch. 4 - What two courses of action are available to a...Ch. 4 - What is a derived attribute? Give an example. What...Ch. 4 - Prob. 11RQ
Ch. 4 - Discuss two ways in which the 1:M relationship...Ch. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Briefly, but precisely, explain the difference...Ch. 4 - What are multivalued attributes, and how can they...Ch. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - What two attributes must be contained in the...Ch. 4 - Describe precisely the composition of the...Ch. 4 - Prob. 21RQCh. 4 - Prob. 1PCh. 4 - Create a complete ERD in Crows Foot notation that...Ch. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11C
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