When a student has not selected a major at a university, the university typically puts a value of "Undecided" for the major field. Is "Undecided" a method to express the null value? Should it be used as a default value? Justify your answer carefully.

When a student has not selected a major at a university, the university typically puts a value of "Undecided" for the major field. Is "Undecided" a method to express the null value? Should it be used as a default value? Justify your answer carefully.

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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When a student has not selected a major at a university, the university typically puts a value of "Undecided" for the
major field. Is "Undecided" a method to express the null value? Should it be used as a default value? Justify your
answer carefully.

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