A ________ is an attribute that appears as a non-primary key attribute in one relation and as a primary key attribute (or part of a primary key)in another relation.
A)Referential integrity
B)Primary key
C)Foreign key
D)Unique key

Question

Quizplus · Accepted Answer

A foreign key is an attribute that appears as a non-primary key attribute in one relation (the referring or foreign relation) and as a primary key attribute (or part of a primary key) in another relation (the referred or primary relation). This relationship maintains referential integrity between the two relations.

A ________ Is an Attribute That Appears as a Non-Primary