1. What is the difference between primary and unique key?
Overview
This question determines the applicant's knowledge of database terminology. It is a simple question but one that shows a basic understanding of database technology.
Overview
This question determines the applicant's knowledge of database terminology. It is a simple question but one that shows a basic understanding of database technology.
Interview Expectations
Knowledge of database terminology
Ability to apply knowledge to real-world situations
Ability to apply knowledge to future projects
Sample Answer
A primary key is the field or set of fields that uniquely identifies each row in a table. A unique key is a field or set of fields that uniquely identifies each row in a table.