For the Manages relationship in Figure 2-12a, describe one or more situations that would result in different
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For the Manages relationship in Figure 2-12a, describe one or more situations that would result in different cardinalities on the two ends of this unary relationship. Based on your description for this example, do you think it is always clear simply from an E-R diagram what the business rule is that results in certain cardinalities? Justify your answer.
Figure 2-12a
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Presently the cardinality is onetomany One possible scenario is an employe...View the full answer
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Related Book For 
Modern Database Management
ISBN: 978-0133544619
12th edition
Authors: Jeff Hoffer, Ramesh Venkataraman, Heikki Topi
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