Suppose you want to show that a person can have multiple degrees. Would each of the

QUESTION:

Suppose you want to show that a person can have multiple degrees. Would each of the following two ER diagrams get the job done? Why or why not? What is the difference?

SOLUTION:

The ER diagram on the left permits specification of a maximum of three degrees – in fact, only three specific degrees. The ER diagram on the right, however, is more flexible in that it permits specification of multiple degrees of any kind including no degrees.

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