Let the database has two relations P(a, b) andQ(m, a, n) in which a is the primary key of therelation P and m is the primary key of therelation Q. Instance of P has 70 Tuples andInstance of Q has 42. What is the maximumnumber of rows in the new instance produced byP Q? ( is natural join)

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has two relations ch a is the primary is the primary key nce of P has 70 Tup s 42. What is the m in the new instance

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

Let the database has two relations P(a, b) and
Q(m, a, n) in which a is the primary key of the
relation P and m is the primary key of the
relation Q. Instance of P has 70 Tuples and
Instance of Q has 42. What is the maximum
number of rows in the new instance produced by
P Q? ( is natural join)

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