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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Chapter 3, Problem 3.15RQ

What do you purchase when you acquire a packaged data model?

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Chapter 3, Problem 3.14RQ

Chapter 3, Problem 3.16RQ

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What do you purchase when you acquire a packaged data model?

What kinds of trade-offs do you have to make when creating widely scattered data environments?

What actions can you take to make sure your model has all the data it needs? How may problem statements benefit from data modeling techniques?

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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