The following two ER diagrams contain both a cardinality ratio constraint and a participation constraint. a. In
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a. In the first ER diagram, is the instance diagram on the right consistent with the ER diagram on the left? Why or why not?
b. In the second ER diagram, is the instance diagram on the right consistent with the ER diagram on the left? Why or why not?
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Data Modeling and Database Design
ISBN: 978-1285085258
2nd edition
Authors: Narayan S. Umanath, Richard W. Scammel
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