DATABASE SYSTEM CONCEPTS (LOOSELEAF)
DATABASE SYSTEM CONCEPTS (LOOSELEAF)
7th Edition
ISBN: 9781260515046
Author: SILBERSCHATZ
Publisher: MCG
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Chapter 6, Problem 14E

Explanation of Solution

Difference between primary key, candidate key, and super key:

Primary keyCandidate keySuper key
To identify each record in a table, at least there must be one data field, which should be unique.

Candidate key is an attribute or set of attributes from which a primary key can be selected.

Super key is the set of attributes which can uniquely identify a tuple.
Primary key is used to identify the unique record from a collection of records.

It helps to identify the data uniquely from the table or relation without referring any other data...

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