2. Consider the following schema: Books (book_id, title, year, pub_id, auth_id, price) Authors(auth_id, name, nationality) Publisher(pub_id, name) Sales(copies_sold, book_id, copies_printed) Write down the relational algebra expressions for the following queries a) Give the count of the books published by Pearson each year. b) Name the authors who wrote some book in 2015 and 2016 priced above 200 rupees. c) List the title, author name and publisher name of books written by Indian authors in the year 2019 d) List the publisher IDs with least number of books printed in 2020 e) List the publisher who made profit<500 (profit= book price* (copies printed – copies sold) f) List the author whose books are priced the highest.

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
icon
Related questions
icon
Concept explainers
Question
2. Consider the following schema:
Books (book id, title, year, pub_id, auth_id, price)
Authors(auth_id, name, nationality)
Publisher(pub_id, name)
Sales(copies_sold, book_id, copies_printed)
Write down the relational algebra expressions for the following queries
a) Give the count of the books published by Pearson each year.
b) Name the authors who wrote some book in 2015 and 2016 priced above 200 rupees.
c) List the title, author name and publisher name of books written by Indian authors in
the year 2019
d) List the publisher IDs with least number of books printed in 2020
e) List the publisher who made profit<500 (profit= book price* (copies printed – copies
sold)
f) List the author whose books are priced the highest.
Transcribed Image Text:2. Consider the following schema: Books (book id, title, year, pub_id, auth_id, price) Authors(auth_id, name, nationality) Publisher(pub_id, name) Sales(copies_sold, book_id, copies_printed) Write down the relational algebra expressions for the following queries a) Give the count of the books published by Pearson each year. b) Name the authors who wrote some book in 2015 and 2016 priced above 200 rupees. c) List the title, author name and publisher name of books written by Indian authors in the year 2019 d) List the publisher IDs with least number of books printed in 2020 e) List the publisher who made profit<500 (profit= book price* (copies printed – copies sold) f) List the author whose books are priced the highest.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps

Blurred answer
Knowledge Booster
Query Syntax
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education