Question

What is the difference between a key and a super key?

Answer 1

Answer:

Primary key is a set of one or more fields/columns of a table that uniquely identify a record in database table. Primary keys must contain unique values. There is only one primary key per table. Super key is a set of one or more keys that can be used to identify a record uniquely in a table.

Answer 2

Answer:

Sort Or control key A field or combination of fields that is used to physically sequence the stored data called sort key. It is also known s control key. A superkey is a combination of attributes that can be uniquely used to identify a database record.

Explanation:

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