The following two ER diagrams contain both a cardinality ratio constraint and a participation constraint. a. In

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The following two ER diagrams contain both a cardinality ratio constraint and a participation constraint.
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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Question Posted: Apr 21, 2016 06:24 AM

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The following two ER diagrams contain both a cardinality ratio constraint and a participation constraint. a. In

Question:

SALESPERSON SALES VEHICLE V1 2 V3 SALESPERSON 1 Sells s1 s2 s3 Sales n Sold by VEHICLE Instance Diagram SALESPERSON SALES VEHICLE T Sels 0- SALESPERSON s1 S2 S3 r1 T2 r3 r4 V1 v2 V3 v4 Sales n Sold by VEHICLE V5 Instance Diagram

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