Modern Database Management

13th Edition

ISBN: 9780134773650

Author: Hoffer

Publisher: PEARSON

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Enhanced ER Model

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 3, Problem 3.17RQ

When is a member of a supertype always a member of at least one subtype?

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Chapter 3, Problem 3.16RQ

Chapter 3, Problem 3.18PAE

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Chapter 3 Solutions

Modern Database Management

Ch. 3 - Define each of the following terms: supertype...Ch. 3 - Match the following terms and definitions:...Ch. 3 - Contrast the following terms: supertype; subtype...Ch. 3 - State two conditions that indicate when a database...Ch. 3 - Prob. 3.5RQ Ch. 3 - Give an example (other than those discussed in the...Ch. 3 - What is the attribute inheritance? Why is it...Ch. 3 - Give an example of each of the following: a...Ch. 3 - What types of business rules are normally captured...Ch. 3 - What is the purpose of a subtype discriminator?

Ch. 3 - Prob. 3.11RQ Ch. 3 - In what ways is starting a data modeling project...Ch. 3 - Prob. 3.13RQ Ch. 3 - Prob. 3.14RQ Ch. 3 - What do you purchase when you acquire a packaged...Ch. 3 - In Figure 3-5b, why must the minimum cardinality...Ch. 3 - When is a member of a supertype always a member of...Ch. 3 - Examine the hierarchy for the university EER...Ch. 3 - Add a subtype discriminator for each of the...Ch. 3 - For simplicity, subtype discriminators were left...Ch. 3 - Refer to the employee EER diagram in Figure 3-2....Ch. 3 - Refer to the EER diagram for patients in Figure...Ch. 3 - Figure 3-13 shows the development Of entity...Ch. 3 - Refer to Problem and Exercise 2-44 in Chapter 2...Ch. 3 - For a library, the entity type HOLDING has four...Ch. 3 - A bank has three types of accounts: checking,...Ch. 3 - Refer to your answer to Problem and Exercise 2-4...Ch. 3 - Refer to your answer to Problem and Exercise 3-24...Ch. 3 - Prob. 3.29PAE Ch. 3 - Draw an EER diagram for the following situation:...Ch. 3 - Develop an EER model for the following situation,...Ch. 3 - Prob. 3.32PAE Ch. 3 - Prob. 3.33PAE Ch. 3 - Prob. 3.34PAE Ch. 3 - Based on the EER diagram constructed for Problem...Ch. 3 - Prob. 3.36PAE Ch. 3 - Prob. 3.37PAE Ch. 3 - Add the following to Figure 3-16: An EMPLOYMENT...

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When is a member of a supertype always a member of at least one subtype?

Solution Summary: The author explains that the total specialization rule is used to ensure that every entity of super-type belongs to subtype entity. The patient can be either inpatient or outpatient.

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Chapter 3 Solutions