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Define the term of candidate keys.

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Define the term of candidate keys.

Posted by Binay Sharma 4 years, 4 months ago

CBSE > Class 10 > Computer Applications (165)

1 answers

Meghna Thapar 4 years, 4 months ago

A candidate key is a set of attributes (or attribute) which uniquely identify the tuples in relation or table. As we know that Primary key is a minimal super key, so there is one and only one primary key in any relationship but there is more than one candidate key can take place. The minimal set of attribute which can uniquely identify a tuple is known as candidate key. The value of Candidate Key is unique and non-null for every tuple. There can be more than one candidate key in a relation.

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CBSE > Class 10 > Computer Applications (165)