Consider a schema R, a set F of functional dependencies on R, and two candidate keys (k1, k2) as follows: R = (X,Y,Z). F = {Y → Z,XZ → Y}. k1 = XZ. k2 =XY Is R in BCNF? Is R in 3NF? (a) R is in both BCNF and 3NF (b) R is in BCNF but not in 3NF (c) R is not in BCNF but in 3NF (d) R is in neither BCNF not 3NF
Consider a schema R, a set F of functional dependencies on R, and two candidate keys (k1, k2) as follows: R = (X,Y,Z). F = {Y → Z,XZ → Y}. k1 = XZ. k2 =XY Is R in BCNF? Is R in 3NF? (a) R is in both BCNF and 3NF (b) R is in BCNF but not in 3NF (c) R is not in BCNF but in 3NF (d) R is in neither BCNF not 3NF
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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Consider a schema R, a set F of functional dependencies on R, and two candidate keys (k1, k2) as follows:
R = (X,Y,Z).
F = {Y → Z,XZ → Y}.
k1 = XZ.
k2 =XY
Is R in BCNF? Is R in 3NF?
(a) R is in both BCNF and 3NF
(b) R is in BCNF but not in 3NF
(c) R is not in BCNF but in 3NF
(d) R is in neither BCNF not 3NF
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