A foreign key in a database table is always:
A)A unique identifier for a record in that table.
B)A numeric field.
C)The name of a UML class.
D)A primary key in a related table.

Question

Quizplus · Accepted Answer

A foreign key is a field in a table that refers to the primary key of another table. It is used to establish a relationship between two tables in a database. Therefore, a foreign key is not a unique identifier for a record in that table and it is not necessarily a numeric field. The name of a UML class is also unrelated to the concept of a foreign key.

A Foreign Key in a Database Table Is Always