Each entity in a database has a unique attribute called a(n)________.
A)public key
B)identifier
C)foreign key
D)index field

Question

Quizplus · Accepted Answer

An identifier is a unique attribute that is used to identify each entity in a database. It is also known as a primary key or a key field. The other options are incorrect: a public key is used in encryption and decryption processes, a foreign key is a field that points to a primary key in another table, and an index field is used to improve search performance.

Each Entity in a Database Has a Unique Attribute Called