Difference prime and non prime attribute with example
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Conversely, an attribute that does not occur in ANY candidate key is called a non-prime attribute. Since a relation contains no duplicate tuples, the set of all its attributes is a superkey if NULL values are not used. It follows that every relation will have at least one candidate key.
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Explanation:
Conversely, an attribute that does not occur in ANY candidate key is called a non-prime attribute. Since a relation contains no duplicate tuples, the set of all its attributes is a superkey if NULL values are not used. It follows that every relation will have at least one candidate key.
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