Given the two relations, R1 and R2Relation R1:Name Empld DeptNameHarry 3415 FinanceSally 2241 SalesGeorge 3401 FinanceHarriet 2202 SalesPim5678 AdvertizingRelation R2DeptName ManagerFinanceGeorgeSalesHarrietProduction CharlesHow many rows will be in the table of R1 LEFT OUTER JOIN R2?3O 24 The instructor relationIDName Dept_name Salary10101 Hayley Comp.Sci. 6500012121 Jackson Finance9000015151 Nathan Music8700022222 April Biology7300034345 Crick Comp.Sci. 100000The course relationCourse_id TitleDept_name CreditsCS-101 RoboticsComp.Sci. 5BIO-244 GeneticsBiology4PHY-333 Physical PrinciplesPhysics3MUS-562 Music Video Production Music2FIN-101 Investment BankingFinance3Suppose the Authority want to include a new instructor for the title Neuroscience what command should be inserted ?O Insert into course values(12111.Emma,NeuroScience, 200000);O Insert into instructor values(12111,Emma,NeuroScience, 200000);Insert into course values(12111,Introduction, NeuroScience, 2):Insert into instructor values(12111,Emma, Biology,200000);

Firstly, we will understand what is Left Outer join or we can also call it as Left join. So,

Given the two relations, R1 and R2 Relation R1: Name Empld DeptName Harry 3415 Finance Sally 2241 Sales George 3401 Finance Harriet 2202 Sales Jim 5678 Advertizing Relation R2 DeptName Manager Finance George Sales Harriet

Given the two relations, R1 and R2 Relation R1: Name Empld DeptName Harry 3415 Finance Sally 2241 Sales George 3401 Finance Harriet 2202 Sales Jim 5678 Advertizing Relation R2 DeptName Manager Finance George Sales Harriet

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

Given the two relations, R1 and R2
Relation R1:
Name Empld DeptName
Harry 3415 Finance
Sally 2241 Sales
George 3401 Finance
Harriet 2202 Sales
Pim
5678 Advertizing
Relation R2
DeptName Manager
Finance
George
Sales
Harriet
Production Charles
How many rows will be in the table of R1 LEFT OUTER JOIN R2?
3
O 2
4

The instructor relation
ID
Name Dept_name Salary
10101 Hayley Comp.Sci. 65000
12121 Jackson Finance
90000
15151 Nathan Music
87000
22222 April Biology
73000
34345 Crick Comp.Sci. 100000
The course relation
Course_id Title
Dept_name Credits
CS-101 Robotics
Comp.Sci. 5
BIO-244 Genetics
Biology
4
PHY-333 Physical Principles
Physics
3
MUS-562 Music Video Production Music
2
FIN-101 Investment Banking
Finance
3
Suppose the Authority want to include a new instructor for the title Neuroscience what command should be inserted ?
O Insert into course values(12111.Emma,NeuroScience, 200000);
O Insert into instructor values(12111,Emma,NeuroScience, 200000);
Insert into course values(12111,Introduction, NeuroScience, 2):
Insert into instructor values(12111,Emma, Biology,200000);

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