Observe the ER diagram for the CENTRAL SCHOOL LIBRARYCENTRAL SCHOOL LIBRARY ERDLBIDLBNameCopyIDCoverTypeLIBRARY BOOKHasCOPY(2,10)IswrittenByAUTHORAuthorIDAuthorNameHow many foreign keys in the relational schema mapped from the Central School Library ER diagram serve as acomponent of a primary key?O 3O 4O 1O 2

ER diagram: An entity relationship diagram can be used to visually represent the structural…

Answered: How many foreign keys in the relational…

How many foreign keys in the relational schema mapped from the Central School Library ER diagram serve as a component of a primary key? O 3 O 4 O 1 O 2

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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Concept explainers

Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.

Question

Observe the ER diagram for the CENTRAL SCHOOL LIBRARY
CENTRAL SCHOOL LIBRARY ERD
LBID
LBName
CopyID
CoverType
LIBRARY BOOK
Has
COPY
(2,10)
IswrittenBy
AUTHOR
AuthorID
AuthorName
How many foreign keys in the relational schema mapped from the Central School Library ER diagram serve as a
component of a primary key?
O 3
O 4
O 1
O 2

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