Using MIS (10th Edition)
Using MIS (10th Edition)
10th Edition
ISBN: 9780134606996
Author: David M. Kroenke, Randall J. Boyle
Publisher: PEARSON
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Chapter 5.8, Problem 5.5ARQ

How are data models used for database development?

Explain why user involvement is critical during database development. Describe the function of a data model. Sketch the database development process. Define E-R model, entity, relationship, attribute, and identifier. Give an example, other than one in this text, of an E-R diagram. Define maximum cardinality and minimum cardinality. Give an example of three maximum cardinalities and two minimum cardinalities. Explain the notation in Figures 5-21 and 5-22.

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Draw a level-0 diagram for this scenario: You are developing a new customer relationship management system for the BEC store, which rents out movies to customers. Customers will provide comments on new products, and request rental extensions and new products, each of which will be stored into the system and used by the manager for purchasing movies, extra copies, etc. Each month, one employee of BEC will select their favorite movie pick of that week, which will be stored in the system. The actual inventory information will be stored in the Entertainment Tracker system, and would be retrieved by this new system as and when necessary.
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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