Each table in a database must have two or more primary keys.

Name: Each table in a database must have two or more primary keys.
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Each table in a database must have at least one primary key. A primary key is a column or a combination of columns that uniquely identifies each row in the table. While a table can have multiple columns that make up the primary key, it is not a requirement to have two or more primary keys.

Each Table in a Database Must Have Two or More