Question

Primary Key constraint is combination of which two constraints

Answer 1

A primary key constraint combines a NOT NULL constraint and a unique constraint in a single declaration. That is, it prohibits multiple rows from having the same value in the same column or combination of columns and prohibits values from being null....

Answer 2

Step-by-step explanation:

A PRIMARY KEY constraint designates a column or combination of columns as the table's primary key. To satisfy a PRIMARY KEY constraint, both of the following conditions must be true: No primary key value can appear in more than one row in the table. No column that is part of the primary key can contain a null.