A relation FarmVisit is defined below with attributes in the table headings. FarmVisit visitorID visitorName date farmID farmName t1 H001 John 1 Feb 2021 A10 Green Field t2 H005 Ashley 1 Jan 2021 A10 Green Field t3 1 Feb 2021 Ashley Ashley Ashley H005 Α10 Green Field t4 H005 15 Apr 2021 H02 Есо t5 но06 15 Apr 2021 All Green Field

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
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A relation FarmVisit is defined below with attributes in the table headings.
FarmVisit
visitorID
visitorName
date
farmID
farmName
t1
H001
John
1 Feb 2021
A10
Green Field
t2
Н005
Ashley
1 Jan 2021
A10
Green Field
t3
но05
Ashley
1 Feb 2021
A10
Green Field
t4
H005
Ashley
15 Apr 2021
H02
Есо
t5
Но06
Ashley
15 Apr 2021
A11
Green Field
a) Write down examples of tuples (i.e., tl, t2) to show neither of the following is a functional
dependency:
(i)
visitorID -> date
(ii)
date -> farmID
b) Write down the functional dependency (FDs) using the above data, which can represent all
possible data. The FDs should be non-trivial and the determinants of the FDs should contain
minimal number of attributes required.
c) Using the tuples given, can (visitorID, farmID) be the primary key of FarmVisit? Explain why.
d) What the highest normal form by which the FarmVisit relation can be classified? Explain
why.
Transcribed Image Text:A relation FarmVisit is defined below with attributes in the table headings. FarmVisit visitorID visitorName date farmID farmName t1 H001 John 1 Feb 2021 A10 Green Field t2 Н005 Ashley 1 Jan 2021 A10 Green Field t3 но05 Ashley 1 Feb 2021 A10 Green Field t4 H005 Ashley 15 Apr 2021 H02 Есо t5 Но06 Ashley 15 Apr 2021 A11 Green Field a) Write down examples of tuples (i.e., tl, t2) to show neither of the following is a functional dependency: (i) visitorID -> date (ii) date -> farmID b) Write down the functional dependency (FDs) using the above data, which can represent all possible data. The FDs should be non-trivial and the determinants of the FDs should contain minimal number of attributes required. c) Using the tuples given, can (visitorID, farmID) be the primary key of FarmVisit? Explain why. d) What the highest normal form by which the FarmVisit relation can be classified? Explain why.
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