A relation FarmVisit is defined below with attributes in the table headings.FarmVisitvisitorIDvisitorNamedatefarmIDfarmNamet1H001John1 Feb 2021A10Green Fieldt2Н005Ashley1 Jan 2021A10Green Fieldt3но05Ashley1 Feb 2021A10Green Fieldt4H005Ashley15 Apr 2021H02Есоt5Но06Ashley15 Apr 2021A11Green Fielda) Write down examples of tuples (i.e., tl, t2) to show neither of the following is a functionaldependency:(i)visitorID -> date(ii)date -> farmIDb) Write down the functional dependency (FDs) using the above data, which can represent allpossible data. The FDs should be non-trivial and the determinants of the FDs should containminimal 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? Explainwhy.

answers for all the subsections is given below.

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

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

Section: Chapter Questions

Problem 1PE

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Concept explainers

Fundamentals of Datawarehouse

A data warehouse is a data repository which is used to store large quantities of historical data that are mostly used for creating reports that help businesses to identify their weaknesses and strengths. For example, demographics data about people of a region can help businesses identify the needs and preferences of the region’s population. A data warehouse acts as a central storage for storing data that comes from one or more heterogenous sources. It also consists of data which can be old and of historical value. One of the most important applications of this type of system is that it is used for supporting business intelligence and data analytics applications.

Question

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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