Explain the distinctions among terms primary and super key

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Reference no: EM131876189

Problem

1. Explain the distinctions among the terms primary key, candidate key, and super key.

2. Construct an E-R diagram for a car-insurance company whose customers own one or more cars each. Each car has associated with it zero to any number of recorded accidents.

3. Construct an E-R diagram for a hospital with a set of patients and a set of medical doctors. Associate with each patient a log of the various tests and examinations conducted.

Reference no: EM131876189

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