Consider the following functional dependencies for a relation R(A, B, C, D) A -> (B, C, D), (A, D) -> (B, C) (C, D) -> (A, B) Identify the candidate key(s). A {A}, {C,D} {A}, {C, D}, {A, D} {C, D}
Consider the following functional dependencies for a relation R(A, B, C, D) A -> (B, C, D), (A, D) -> (B, C) (C, D) -> (A, B) Identify the candidate key(s). A {A}, {C,D} {A}, {C, D}, {A, D} {C, D}
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 5
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Consider the following functional dependencies for a relation R(A, B, C, D)
A -> (B, C, D),(A, D) -> (B, C)
(C, D) -> (A, B)
Identify the candidate key(s).
A
{A}, {C,D}
{A}, {C, D}, {A, D}
{C, D}
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