Q. What do you understand by the terms candidate key and cardinality of a relation in a relational database?
Answer =
Answer =
Candidate Key: A candidate key is the one that is capable of becoming primary key. i.e., a field or attribute that has unique value for each row in the relation.
Cardinality: It refers to the total number of tuple in the table.
Cardinality: It refers to the total number of tuple in the table.
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