Use the schema diagram to express the query in relational algebra. sectioncourse idsec idsemesteryearbuildingTOOM_notime_slot_idclassroombuildingroom nocapacitytakesIDcourse idsec idsemesteryeargradetime_slottime slot iddaystart timeend_timeteachesIDcourse idsec idsemesteryearcoursecourse idtitledept_namecreditsprereqcourse idprereq idLSINGstudentIDnamedept_nametot creddepartmentdept_namebuildingbudgetinstructorIDnamedept_namesalaryadvisors id Find the titles of all courses that have been taught in every semester/year.

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Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

Use the schema diagram to express the query in relational algebra.

section
course id
sec id
semester
year
building
TOOM_no
time_slot_id
classroom
building
room no
capacity
takes
ID
course id
sec id
semester
year
grade
time_slot
time slot id
day
start time
end_time
teaches
ID
course id
sec id
semester
year
course
course id
title
dept_name
credits
prereq
course id
prereq id
LSING
student
ID
name
dept_name
tot cred
department
dept_name
building
budget
instructor
ID
name
dept_name
salary
advisor
s id

Find the titles of all courses that have been taught in every semester/year.

Expert Solution

Step 1

Introduction

Relational algebra query is a formal system used to manipulate and query relational databases. It consists of a set of operators that take one or more relations as input and produce a new relation as output. These operators can be combined to form more complex queries that can be used to extract, transform, and filter data in a relational database.