Which of the following is a good example of a primary key in a student table?
A)Address
B)Birthdate
C)First and Last Name
D)Social security number

Question

Quizplus · Accepted Answer

A primary key should be a unique identifier for each record in the table. Social security number is a unique identifier for each student and is therefore a good choice for a primary key. A, B, and C are not unique identifiers and may refer to multiple students, making them poor choices for primary keys.

Which of the Following Is a Good Example of a Primary