Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 3.24PAE
Refer to Problem and Exercise 2-44 in Chapter 2 Part f. Redraw the ERD for your answer to this exercise using appropriate supertypes and subtypes.
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When the issue set consists entirely of nominal characteristics, vector space-based classification algorithms are often not the best option. Your thoughts on this assertion? How would you use ML to the task of categorizing nominal data?
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. 3.5RQCh. 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 - 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. 3.29PAECh. 3 - Draw an EER diagram for the following situation:...Ch. 3 - Develop an EER model for the following situation,...Ch. 3 - Prob. 3.32PAECh. 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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- What's the difference between weak and strong entity sets?arrow_forwardCarry out some study about the positive and negative aspects of using the snowflake and star schemas. Which one is the one that has been normalized a greater amount than the other?arrow_forwardDiscuss the categorization of traceability relations; elicit a short example that describes the classification context; and, if required, construct a diagram.arrow_forward
- If the issue set consists entirely of nominal characteristics, vector space-based classification algorithms are usually not the best option. Let me know what you think about this assertion. How would you apply ML to the task of categorizing nominal data?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_forwardGive an example of a supertype/subtype relationship where the overlaprule appliesarrow_forward
- Explain weak and strong entity sets.arrow_forwardVector space classification methods frequently fail when applied to problem sets with nominal feature sets alone. What do you think of the statement? Using ML, how would you classify nominal data? Answer each of the above queries in detail.arrow_forwardGive an example of a supertype/subtype relationship.arrow_forward
- In the context of EER data modeling, one can represent entities using superclasses and subclasses. Using your own model, explain why one would want to introduce the concepts of superclasses and subclasses into an EER model? I. II. Describe and illustrate using the model in question (I) the process of attribute inheritance. With the model in question (I) describe and contrast the process of specialization with the process of generalization. III. IV. Modify the model to describe the two main constraints that apply to a specialization/generalization relationship.arrow_forwardGive an example of a supertype/subtype relationship where the disjoint rule appliesarrow_forwardWhat is the function of a ModelGen operator? A It identifies fundamental conflicts and devises rules for resolving them. B It takes a model in one meta-model and translates it into another meta-model. (C) It transforms the data from one data model to another and applies a schema mapping. D It transforms data from the model and schema in which it is stored into the target message format.arrow_forward
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