The NOT NULL keywords are often used with primary keys to require that a field include a value.

Name: The NOT NULL keywords are often used with primary keys to require that a field include a value.
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Quizplus · Accepted Answer

This statement is true. The NOT NULL keyword is used to specify that a field cannot have a NULL value. This is often important for primary keys, as they should have a unique and non-null value for each record in a table.

The NOT NULL Keywords Are Often Used with Primary Keys