A primary key is the field (or fields) that is often employed to specifically identify each record in a table.
What is the role of this key?
The Primary key is known to be the key that helps a user to be able to form a specific identifier for each row in one's table.
Note that it helps a person to link your table to other tables and as such, a primary key is the field (or fields) that is often employed to specifically identify each record in a table.
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