20 - Consider the following Entitiy Relationship diagram. Which of the following relation will not hold if the above ER diagram is mapped into a relational model? I) Product (ProductId, Desciption) II) Requests (ProductId, Orderld) II) Order (Orderld, Productld, Date) IV) Order (Orderld, Date)

20 - Consider the following Entitiy Relationship diagram. Which of the following relation will not hold if the above ER diagram is mapped into a relational model? I) Product (ProductId, Desciption) II) Requests (ProductId, Orderld) II) Order (Orderld, Productld, Date) IV) Order (Orderld, Date)

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

20 - Consider the following Entitiy Relationship diagram. Which of the following relation
will not hold if the above ER diagram is mapped into a relational model?
I) Product (ProductId, Desciption)
II) Requests (ProductId, Orderld)
III) Order (Orderld, Productid, Date)
IV) Order (Orderld, Date)
ProductID
Description
Orderld
Date
M
N
Product
Requests
Order
IV
b)
II
c) O I
d) O I|

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