Let R(A, B, C) be arelational schema with the following functional dependencies : {A— >B,B—>C,C— >A} The decomposition of Rinto (A, B), (B, C). A. Gives a lossless join, and is dependency preserving B. Gives a lossless join, but is not dependency preserving C. Does not give a lossless join, but is dependency preserving D. Does not give a lossless join and is not dependency preserving
Let R(A, B, C) be arelational schema with the following functional dependencies : {A— >B,B—>C,C— >A} The decomposition of Rinto (A, B), (B, C). A. Gives a lossless join, and is dependency preserving B. Gives a lossless join, but is not dependency preserving C. Does not give a lossless join, but is dependency preserving D. Does not give a lossless join and is not dependency preserving
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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Let R(A, B, C) be arelational schema with the following functional dependencies :
{A— >B,B—>C,C— >A}
The decomposition of Rinto (A, B), (B, C).
A. Gives a lossless join, and is dependency preserving
B. Gives a lossless join, but is not dependency preserving
C. Does not give a lossless join, but is dependency preserving
D. Does not give a lossless join and is not dependency preserving
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