Latest DBMS Aptitude Question SOLUTION: What is difference between a super key, a key, a candidate key and a primary key?

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(#M40030362) DBMS question DBMS Keep an EYE

What is difference between a super key, a key, a
candidate key and a primary key?

Asked In DBMS MAN (10 years ago)

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tushar malhotra  (9 years ago)

super key has properties of uniqueness but not necessarily irreducability
a key is a aatribute or set of attributes of a relation that uniquely associate an entity
candidate has properties of uniqueness and irreducability
primary key is any candidate key that associates an entity

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