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    relationship diagram

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    Give an example of a 1:1 HAS-A relationship. Construct the relationship so that one entity is required and the other is optional.

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    https://brainmass.com/computer-science/data-structures/relationship-diagram-139884

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    Take for example a university system where each student is identified by his or her student's ID number.
    So a ...

    Solution Summary

    A relationship diagram

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