What is the difference between a primary key and a superkey in a DBMS

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primary-key unique-constraint candidate-key

                          1) What is the difference between a primary key and a superkey in a DBMS?

2) Can a primary key and a superkey **both** have multiple columns?

3) Is a primary key a subset of a superkey or vice versa?

Asked by MikeHil (369 rep)

Jul 20, 2014, 12:13 PM
Last activity: Jan 8, 2023, 02:48 PM

What is the difference between a primary key and a superkey in a DBMS

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