Bundle: Database Systems: Design, Implementation, & Management, 13th + Mindtap Mis, 1 Term (6 Months) Printed Access Card
13th Edition
ISBN: 9781337745703
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Chapter 4, Problem 5P
a.
Program Plan Intro
Entity Relationship (ER) Diagram:
The following figure illustrates the ER Diagram for Hudson Engineering Group in (HEG) Crow’s Foot notation:
Explanation:
- In above ERD, A trainee can take several class and each class can have more trainees, so there is an “M: N” relationship between the entities TRAINEE and CLASS. Hence a composite entity “ENROLLMENT” is act as bridge between those entities.
- The relationship between the entities INSTRUCTOR and CLASS is 1: M. Because a class is taken by only one instructor but an instructor can take more classes.
- The relationship between the entities COURSE and CLASS is also1: M.
b.
Explanation of Solution
Relationship:
The relationship between the entities INSTRUCTOR and CLASS is 1: M. Because a class is taken by only one instructor but an instructor can take several classes...
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Chapter 4 Solutions
Bundle: Database Systems: Design, Implementation, & Management, 13th + Mindtap Mis, 1 Term (6 Months) Printed Access Card
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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