Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
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Chapter 3, Problem 3.20PAE
For simplicity, subtype discriminators were left off many figures in this chapter. Add subtype discriminator notation in each figure listed below. If necessary, create a new attribute for the discriminator.
- Figure 3-2
- Figure 3-3
- Figure 34
- Figure 3-7
- Figure 3-7
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For simplicity, subtype discriminators were left off many figures in this chapter. Add subtype discriminator notation in each figure listed below. If necessary, create a new attribute for the discriminator.
When using subtype associations, talk about the database table choices that are accessible.Decide the design you want to employ and talk about the relevant issues.
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Chapter 3 Solutions
Modern Database Management (12th Edition)
Ch. 3 - Define each of the following terms: supertype...Ch. 3 - Prob. 3.2RQCh. 3 - Contrast the following terms: supertype; subtype...Ch. 3 - State two conditions that indicate when a database...Ch. 3 - Prob. 3.5RQCh. 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. 3.11RQCh. 3 - In what ways is starting a data modeling project...Ch. 3 - Prob. 3.13RQCh. 3 - Prob. 3.14RQCh. 3 - What do you purchase when you acquire a packaged...Ch. 3 - Prob. 3.16RQCh. 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. 3.29PAECh. 3 - Prob. 3.30PAECh. 3 - Develop an EER model for the following situation,...Ch. 3 - Draw an EER diagram for the following description...Ch. 3 - Prob. 3.33PAECh. 3 - Prob. 3.34PAECh. 3 - Based on the EER diagram constructed for Problem...Ch. 3 - Prob. 3.36PAECh. 3 - Prob. 3.37PAECh. 3 - Add the following to Figure 3-16: An EMPLOYMENT...
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- A college course may have one or more scheduled sections or may not have a scheduled section. Attributes of COURSE include Course ID, Course Name, and Units. Attributes of SECTION include Section Number and Semester ID. Semester ID is composed of two parts: Semester and Year. Section Number is an integer (such as 1 or 2) that distinguishes one section from another for the same course but does not uniquely identify a section. How did you model SECTION? Why did you choose this way versus alternative ways to model SECTION?arrow_forwardWhat do you mean specifically by attribute interpolation?arrow_forwardThe term "interpolation of attributes" is a little vague.arrow_forward
- What does it imply precisely when someone says "Identifier attribute"?arrow_forwardLet's say you wish to train and assess a classifier using just a little amount of data. Which approach would you use to assess the classifier? Why?arrow_forwardWhen developing subtype associations, talk about the database table options.Discuss the factors that would influence your decision to choose one design over the others.arrow_forward
- Give few special guidelines for naming attributes?arrow_forwardTo be more specific, what do you mean when you say "interpolation of characteristics"?arrow_forwardGive an example of each of the following: a. a supertype/subtype relationship where the disjoint rule applies b. a supertype/ subtype relationship where the overlap rule appliesarrow_forward
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