13th Edition

ISBN: 9780134773650

Author: Hoffer

Publisher: PEARSON

Concept explainers

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of …

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Textbook Question

Chapter 4, Problem 4.28PAE

For each of the following E-R diagrams from Chapter 2 C:

Transform the diagram to a relational schema that shows referential integrity constraints (see Figure 4-5 for an example of such a schema).
For each relation, diagram the functional dependencies (see Figure 4-23 for an example).
If any of the relations are not in 3NF, transform them to 3NF.

Figure 2-8
Figure 2-9b
Figure 2-11a
Figure 2-11b
Figure 2-15a (relationship version)
Figure 2-15b (attribute version)
Figure 2-16b
Figure 2-1912

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Chapter 4, Problem 4.27RQ

Chapter 4, Problem 4.29PAE

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Chapter 4 Solutions

Modern Database Management

Ch. 4 - Define each of the following terms: determinant...Ch. 4 - Prob. 4.2RQ Ch. 4 - Prob. 4.3RQ Ch. 4 - Describe the primary differences between the...Ch. 4 - Summarize six important properties of relations.Ch. 4 - Describe two properties that each candidate key...Ch. 4 - Describe the three types of anomalies that can...Ch. 4 - Demonstrate each of the anomaly types with an...Ch. 4 - Fill in the blanks in each of the following...Ch. 4 - What is a well-structured relation? Why are...

Ch. 4 - Prob. 4.11RQ Ch. 4 - Describe how the following components of an E-R...Ch. 4 - Prob. 4.13RQ Ch. 4 - Prob. 4.14RQ Ch. 4 - Briefly describe four typical problems that often...Ch. 4 - Prob. 4.16RQ Ch. 4 - Explain how each of the following types of...Ch. 4 - Prob. 4.18RQ Ch. 4 - Prob. 4.19RQ Ch. 4 - Prob. 4.20RQ Ch. 4 - Prob. 4.21RQ Ch. 4 - What is the relationship between the primary key...Ch. 4 - Prob. 4.23RQ Ch. 4 - Explain what can be done with primary keys to...Ch. 4 - Prob. 4.25RQ Ch. 4 - Explain three conditions that suggest a surrogate...Ch. 4 - Prob. 4.27RQ Ch. 4 - For each of the following E-R diagrams from...Ch. 4 - Prob. 4.29PAE Ch. 4 - Prob. 4.30PAE Ch. 4 - For your answers to the following Problems and...Ch. 4 - Figure 4-3212 shows a class list for Millennium...Ch. 4 - Prob. 4.33PAE Ch. 4 - Prob. 4.34PAE Ch. 4 - Prob. 4.35PAE Ch. 4 - Prob. 4.36PAE Ch. 4 - Prob. 4.37PAE Ch. 4 - Prob. 4.38PAE Ch. 4 - Prob. 4.39PAE Ch. 4 - Transform Figure 2-15a, attribute version, to 3NF...Ch. 4 - The Public Safety office at Millennium College...Ch. 4 - Prob. 4.42PAE Ch. 4 - Prob. 4.43PAE Ch. 4 - Prob. 4.44PAE Ch. 4 - For your answers to Problem and Exercise 3-33 from...Ch. 4 - Prob. 4.46PAE Ch. 4 - Prob. 4.47PAE Ch. 4 - Figure 4-38 includes an EER diagram for a...Ch. 4 - Prob. 4.49PAE Ch. 4 - Prob. 4.50PAE Ch. 4 - Prob. 4.51PAE Ch. 4 - Prob. 4.52PAE Ch. 4 - Figure 4-40 shows an EER diagram for a university...Ch. 4 - Explore the data included in Table 4-9. Assume...Ch. 4 - Prob. 4.55PAE Ch. 4 - Prob. 4.56PAE Ch. 4 - Prob. 4.57PAE Ch. 4 - Prob. 4.58PAE

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