Pearson eText for Modern Database Management -- Instant Access (Pearson+)
Pearson eText for Modern Database Management -- Instant Access (Pearson+)
13th Edition
ISBN: 9780137305940
Author: Jeffrey Hoffer, Ramesh Venkataraman
Publisher: PEARSON+
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Chapter 1, Problem 1.14RQ
Program Plan Intro

Four perspective which can be used to explore transactional systems in this book and main competencies associated with each of these perspectives.

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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?
What 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.
(a) Explain carefully four ways in which the diagram fails to model the intended world. In each case make sure you contrast the actual meaning with the intended meaning. (b) Give an entity-relationship diagram, still using two entity types, which correctly models the intended world. (c) Give a database schema (including primary keys) for the ER diagram which you have given in the previous part. (d) Is there any part of the ER diagram which is not captured in the schema? How might this aspect be captured in the final database?
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