Somebody told Tshepo that data redundancy causes problems. And yet he has seen database designs that have foreign keys that look to him like duplicate data. Q.2.3.1 Explain what foreign keys are. (2) Q.2.3.2 Explain why foreign keys are not redundant data

Somebody told Tshepo that data redundancy causes problems. And yet he has seen database designs that have foreign keys that look to him like duplicate data. Q.2.3.1 Explain what foreign keys are. (2) Q.2.3.2 Explain why foreign keys are not redundant data

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Somebody told Tshepo that data redundancy causes problems. And yet he has seen
database designs that have foreign keys that look to him like duplicate data.
Q.2.3.1 Explain what foreign keys are. (2)
Q.2.3.2 Explain why foreign keys are not redundant data.

Organized collection of structured information, or data, typically stored in a computer system.

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