How Many Primary Keys Can Have in a Table?

A primary key is a field or set of fields with values that are unique throughout a table. Values of the key can be used to refer to entire records, because each record has a different value for the key. Each table can only have one primary key.

Can table have 2 primary keys?

A table can have only ONE primary key; and in the table, this primary key can consist of single or multiple columns (fields).

Can a table have 3 primary keys?

A table can only ever have a one primary key. It is not possible to create a table with two different primary keys. You can create a table with two different unique indexes (which are much like a primary key) but only one primary key can exist.