Extend the e-r diagram using generalization, Data Structure & Algorithms

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Extend the e-r diagram using generalization

Consider the E-R diagram in Figure7-29, which models an online bookstore.
a. List the entity sets and their primary keys.
b. Suppose the bookstore adds Blu-Ray disks and downloadable video to its collection. The same music item may be present in cassette or compact disk format, with differing prices. Extend the E-R diagram to model this addition, ignoring the effect on shopping baskets.
c. Now extend the E-R diagram, using generalization, to model the case where a shopping basket may contain any combination of books Blu-Ray disks or downloadable video .

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Data Structure & Algorithms: Extend the e-r diagram using generalization

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Recent Questions Asked Data Structure & Algorithms

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Data Structure & Algorithms: Extend the e-r diagram using generalization

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Recent Questions Asked Data Structure & Algorithms

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