What Is The Difference Between Primary Key And Unique Key?

1.	What Is The Difference Between Primary Key And Unique Key?
Answer» PRIMARY KEY – It can ACCEPTS 0 value and cannot be NULL. Unique Key – It can be NULL. Primary Key – It can accepts 0 value and cannot be NULL. Unique Key – It can be NULL.

Answer»

PRIMARY KEY – It can ACCEPTS 0 value and cannot be NULL.
Unique Key – It can be NULL.

Primary Key – It can accepts 0 value and cannot be NULL.
Unique Key – It can be NULL.

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