Only one ____ constraint can exist for each table.
A) PRIMARY KEY
B) FOREIGN KEY
C) UNIQUE
D) CHECK

Name: Only one ____ constraint can exist for each table. A) PRIMARY KEY B) FOREIGN KEY C) UNIQUE D) CHECK
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Question

Only one ____ constraint can exist for each table.​
A) ​PRIMARY KEY
B) ​FOREIGN KEY
C) ​UNIQUE
D) ​CHECK

Quizplus · Accepted Answer

A PRIMARY KEY constraint uniquely identifies each record in a table. Each table can have only one PRIMARY KEY constraint, which ensures that no two rows can have the same value for the primary key column(s) and that a primary key column cannot contain NULL values.

Only One ____ Constraint Can Exist for Each Table