From the following choices,the best example of a primary key for an employee table would be his or her:
A)Social Security number
B)Phone number
C)Last name
D)Office number

Question

Quizplus · Accepted Answer

Social Security number is a unique identifier assigned to individuals by the government and is a widely accepted primary key in many databases. Phone number, last name, and office number are not necessarily unique and can lead to data duplication and errors.

From the Following Choices,the Best Example of a Primary Key