SIf a decomposition of a relation R into R¡ and R2 is lossless, then which of the followings are true? |(a) R can be reproduced by natural join of R1 and R2 (i.e, by R¡ ¤R2).. |(b) All the functional dependencies can be checked without computing Rị ¤ R2. (c) R1NR2 forms a super key for either R1 or R2. |(d) All of them.

SIf a decomposition of a relation R into R¡ and R2 is lossless, then which of the followings are true? |(a) R can be reproduced by natural join of R1 and R2 (i.e, by R¡ ¤R2).. |(b) All the functional dependencies can be checked without computing Rị ¤ R2. (c) R1NR2 forms a super key for either R1 or R2. |(d) All of them.

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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