In a relational database, requiring that every record in a table have a unique identifier is called the
A. entity integrity rule.
B. referential integrity rule.
C. unique primary key rule.
D. foreign key rule.
Answer:A
In a relational database, requiring that every record in a table have a unique identifier is called the
A. entity integrity rule. B. referential integrity rule. C. unique primary key rule. D. foreign key rule.