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The Monetary System

Every relatio...

Question

Every relation that has at least one key by default, which is the combination of all its attributes is called _________ by default, which specifies uniqueness constraint.

A

Financial key

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B

Super-key

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C

Attribute key

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D

Candidate key

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Solution

The correct option is B Super-key
Each data record, which corresponds to a tuple of a relation, in a table must be distinct. Every relation has at least one key by default, which is the combination of all its attributes. This key is called super-key by default.

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