In a given relationship R, if an attribute A uniquely defines all other attributes, then the attribute A is a key attribute which is also known as the _________ key.(a) Candidate(b) Join(c) Functional(d) None of the MentionedI have been asked this question in examination.This is a very interesting question from Normalization in division Planning Oracle Applications of Oracle

In a given relationship R, if an attribute A uniquely defines all othe

1.	In a given relationship R, if an attribute A uniquely defines all other attributes, then the attribute A is a key attribute which is also known as the _________ key.(a) Candidate(b) Join(c) Functional(d) None of the MentionedI have been asked this question in examination.This is a very interesting question from Normalization in division Planning Oracle Applications of Oracle
Answer» The correct answer is (a) Candidate The explanation is: A candidate key is a column, or SET of columns, in a table that can uniquely identify any DATABASE record without referring to any other data. Each table MAY have ONE or more candidate KEYS.

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