nsider a relation with schema and functional dependencies: R = (A, B, C, D) {AB-C, CD, D→A} hich of the following dependencies are implied by those above. Show the steps of and indicate which of Armstrong's axioms is applied in each step. .C → AD -D → AC AB → CD AC → ABD
nsider a relation with schema and functional dependencies: R = (A, B, C, D) {AB-C, CD, D→A} hich of the following dependencies are implied by those above. Show the steps of and indicate which of Armstrong's axioms is applied in each step. .C → AD -D → AC AB → CD AC → ABD
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 relation with schema and functional dependencies:
R = (A, B, C, D)
{AB→C, CD, D→A}
Which of the following dependencies are implied by those above. Show the steps of your
proof and indicate which of Armstrong's axioms is applied in each step.
1. CAD
2. D → AC
3. AB → CD
4. AC → ABD](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F755660c6-b240-48b1-bb87-69fe1fab31dd%2Fd6853132-26d9-4058-96ac-020c4a033690%2F1kdlcoc_processed.png&w=3840&q=75)
Transcribed Image Text:Consider a relation with schema and functional dependencies:
R = (A, B, C, D)
{AB→C, CD, D→A}
Which of the following dependencies are implied by those above. Show the steps of your
proof and indicate which of Armstrong's axioms is applied in each step.
1. CAD
2. D → AC
3. AB → CD
4. AC → ABD
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