Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Chapter 4, Problem 4.24RQ
What is an inclusive subtype relationship? Give an example other than one shown in this chapter. Draw an IE Crow’s Foot E-R diagram for your example.
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Give an example of each subtype and supertype relationship?
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Chapter 4 Solutions
Database Concepts (8th Edition)
Ch. 4 - Prob. 4.1RQCh. 4 - Prob. 4.2RQCh. 4 - Prob. 4.3RQCh. 4 - What is a use case, and what is its purpose?Ch. 4 - Give an example of a data constraint.Ch. 4 - Prob. 4.6RQCh. 4 - Define the term entity, and give an example other...Ch. 4 - Explain the difference between an entity class and...Ch. 4 - Define the term attribute, and give examples for...Ch. 4 - Define the term identifier, and indicate which...
Ch. 4 - Prob. 4.11RQCh. 4 - Prob. 4.12RQCh. 4 - Prob. 4.13RQCh. 4 - Prob. 4.14RQCh. 4 - List and give an example of the three types of...Ch. 4 - Prob. 4.16RQCh. 4 - Prob. 4.17RQCh. 4 - Prob. 4.18RQCh. 4 - Define the term weak entity, and give an example...Ch. 4 - Explain the ambiguity in the definition of the...Ch. 4 - Define the term associative entity, and give an...Ch. 4 - Define the terms supertype, subtype, and...Ch. 4 - What is an exclusive subtype relationship? Give an...Ch. 4 - What is an inclusive subtype relationship? Give an...Ch. 4 - Prob. 4.25RQCh. 4 - Prob. 4.26RQCh. 4 - Prob. 4.27RQCh. 4 - Prob. 4.28RQ
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- What is the attribute that could be obtained using other attributes in the Entity-Relationship Diagram? Select one: a.Multi-Valued Attribute b.Derived / Calculates Attribute c.Single-Valued Attribute d.Composite Attributearrow_forwardWhat are the applications of entity-relationship diagrams? What kind of symbol is used to depict a relationship? What exactly is a "associative entity"? Please provide an example.arrow_forwardWhat is the definition of "weak entity type"? Does it have a secret? Can you elucidate what "attribute" means?How would sia appear on an ER chart? Please depict with a diagram.arrow_forward
- What exactly does it mean to be a "weak entity type"? Do you know the trick? What exactly does the word "attribute" mean?What does an ER chart look like for sia? If possible, a schematic would be helpful.arrow_forwardWhat is the purpose of entity-relationship diagrams? What sort of symbol is used to depict a connection, and how does it work? What exactly does the phrase "associative entity" imply and what does it mean? Give an example.arrow_forwardWhat are the key distinctions between a straightforward multivalued attribute and a repeating group?arrow_forward
- Let's say that in addition to being a component of the primary key, an attribute is also a candidate key. What is your reaction to this information?arrow_forwardCan you define the weak entity type for me? Is there a secret to it? Provide an instance Just what does it mean to specialize in attribute?Where does ia fit into an ER diagram? Provide Illustration or Diagramarrow_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
- When creating subtype associations, it is important to consider the database table possibilities accessible to you.Discuss the factors that you would consider when deciding one design to employ over the others.arrow_forwardWhen establishing subtype associations, consider all of your database table choices.Describe the criteria you'd use to choose one design above the others.arrow_forwardWhat exactly are entity-relationship diagrams, and how do they come into play? What kind of symbol is utilized to represent a relationship? What is an associative entity, and how does it work? Give an illustration of your point.arrow_forward
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Enhanced Entity Relationship Model; Author: Data Science Center;https://www.youtube.com/watch?v=ocQUtXPumdQ;License: Standard YouTube License, CC-BY