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The attribute AGE is calculated from DATE_OF_BIRTH. The attribute AGE is

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The attribute AGE is calculated from DATE_OF_BIRTH. The attribute AGE is

(a) Single valued

(b) Multi valued

(c) Composite

(d) Derived

The question was asked by my college director while I was bunking the class.

Query is from The Entity-Relationship Model in portion Database Systems Design and Implementation of Database Management

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Best answer
Right choice is (d) Derived

The explanation is: The value for this type of attribute can be derived from the values of other related attributes or entities.

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