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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Textbook Question
Chapter 4, Problem 4.15RQ
List and give an example of the three types of binary relationships other than the ones used in this book. Draw both a traditional E-R diagram and an IE Crow’s Foot E-R diagram for each.
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Describe how the relationship (M:N) of an E-R diagram is transformed into relations
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Describe how the relationship (1:M) of an E-R diagram is transformed into relations
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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- Data modelling is most often accomplished through the use of a(an) ________________. a. entity-relationship diagram b. data-flow diagram c. functional decomposition diagram d. activity diagramarrow_forwardList and give an example of the three types of binary relationships other than the ones used in this book. Draw both a traditional E-R diagram and an IE Crow’s Foot E-R diagram for each.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
- Entity-relationship diagrams have a specific function, which is explained below. And what kind of symbol is utilised to represent a relationship, and how does it function? In what way does the word "associative entity" convey that something is happening and what does it mean? Could you provide an example?arrow_forwardDescribe how the relationship (supertype/subtype) of an E-R diagram is transformed into relationsarrow_forwardHow do you map a "One to Many" relationship when mapping ER Diagram to Schema Select one: O a. Take the primary key of entity in the "Many" side and put it as a foreign key in the table representing entity in the "One" side O b. Take the primary key of entities the "One" and "Many" sides and put them as foreign keys in a separate table O c. Take the primary key of entity in the "Many" side and put it as a foreign key in the table representing entity in the "full" side O d. Take the primary key of entity in the "One" side and put it as a foreign key in the table representing entity in the "Many" sidearrow_forward
- Describe how the composite attribute of an E-R diagram is transformed into relationsarrow_forwardHow does an entity-relationship diagram work and what precisely is it?arrow_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_forward
- How are entity-relationship diagrams used? What kind of symbol is utilized to represent a relationship? What does the term "associative entity" mean? Give an example.arrow_forwardBuild an entity-relationship diagram, deriving relations and validating relations using normalization up to third normal formarrow_forwardConsider the following E/R diagram with isa relationships, noting that attribute b is the key of R. If we use an E/R-style approach and convert this diagram into relations, which of the following relations will be among the result? Select one: Y(a,c,d) T(a,b,d) Z(b,c) S X(a,b,c,d) R barrow_forward
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