A primary key is ________.
A) not required to be unique
B) used to represent columns in relationships
C) a candidate key
D) always automatically generated by the DBMS
E) comprised of exactly one attribute

Question

Quizplus · Accepted Answer

A primary key is a candidate key, which means that it must uniquely identify each row in a table. It cannot be null or have duplicate values. It is used to establish relationships between tables, and it can be composed of one or more attributes. While DBMS may have a built-in mechanism for generating primary keys, it is not always the case that they are automatically generated.

A Primary Key Is ________