Suppose the following logical relational data model having one universalrelation in 1st normal form:Car(V incode,Model,Colour,Engine,Doors)All attributes are functionally dependent on V incode attribute (i.e. theV incode is the (only) key of the relation). Moreover, the attribute Doorsis functionally dependent on attribute Model (ie. two cars of the samemodel have to necesarilly have the same number of doors).(a) Is the above relation in 2nd normal form? Why?(b) Is the above relation in 3rd normal form? Why?(c) If not, how the logical relational model should be changed to achieveat least the 3rd normal form? Suppose the following logical relational data model having one universalrelation in 1st normal form:Car(Vincode,M odel,Colour,Engine,Doors)All attributes are functionally dependent on Vincode attribute (i.e. theVincode is the (only) key of the relation). Moreover, the attribute Doorsis functionally dependent on attribute Model (ie. two cars of the samemodel have to necesarilly have the same number of doors).(a) Is the above relation in 2nd normal form? Why? (b) Is the above relation in 3rd normal form? Why?(c) If not, how the logical relational model should be changed to achieveat least the 3rd normal form?

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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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Suppose the following logical relational data model having one universal
relation in 1st normal form:
Car(V incode,Model,Colour,Engine,Doors)
All attributes are functionally dependent on V incode attribute (i.e. the
V incode is the (only) key of the relation). Moreover, the attribute Doors
is functionally dependent on attribute Model (ie. two cars of the same
model have to necesarilly have the same number of doors).
(a) Is the above relation in 2nd normal form? Why?

(b) Is the above relation in 3rd normal form? Why?
(c) If not, how the logical relational model should be changed to achieve
at least the 3rd normal form?

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