Consider the following Books database which is used to keep track of books and their readers. Assume that the database is composed of the following three relations where the key attributes are underlined. PERSON Gender READS PID 111 111 222 333 444 BOOK Title BID PYear Price 2016 PID Name BooklD StartDate 2/4/2015 2/6/2015 8/4/2017 2/6/2015 2/4/1995 2/8/1995 1 Internet 50 111 Sami Khawla Rawan Zainab Khamis 3 programming Database System Programmin g using C++ 222 333 444 555 2 2013 45 4 F 3 2011 25 2 M 444 1 4 2009 Operating Systems Oracle DBMS 35 2017 50 • Write a SQL query to display the information including title, name (person name), and PID of all the books which have been read (StartDate) in the year 2015, and the price of these books is less than 50. Convert the generated SQL query into a Relational algebra query. Then, draw the optimized query tree (fifth step of query optimization). Note: You can draw a tree on a paper, scan, and upload in the Moodle OR you can describe tree stepwise like English sentences starting from leaf node (first step) to upwards
Consider the following Books database which is used to keep track of books and their readers. Assume that the database is composed of the following three relations where the key attributes are underlined. PERSON Gender READS PID 111 111 222 333 444 BOOK Title BID PYear Price 2016 PID Name BooklD StartDate 2/4/2015 2/6/2015 8/4/2017 2/6/2015 2/4/1995 2/8/1995 1 Internet 50 111 Sami Khawla Rawan Zainab Khamis 3 programming Database System Programmin g using C++ 222 333 444 555 2 2013 45 4 F 3 2011 25 2 M 444 1 4 2009 Operating Systems Oracle DBMS 35 2017 50 • Write a SQL query to display the information including title, name (person name), and PID of all the books which have been read (StartDate) in the year 2015, and the price of these books is less than 50. Convert the generated SQL query into a Relational algebra query. Then, draw the optimized query tree (fifth step of query optimization). Note: You can draw a tree on a paper, scan, and upload in the Moodle OR you can describe tree stepwise like English sentences starting from leaf node (first step) to upwards
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
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![Consider the following Books database which is used to keep track of books and their readers. Assume that the database is composed of the following three relations where the key
attributes are underlined.
BOOK
Title
PERSON
READS
PID
111
111
222
333
444
BID
PID
111
Gender
BookID
StartDate
2/4/2015
PYear Price
Name
2
Internet
programming
Database
System
Programmin
g using C++
1
2016
50
Sami
M
3
2/6/2015
8/4/2017
Khawla
Rawan
Zainab
Khamis
222
2
2013
45
4
333
444
2
2/6/2015
3
2011
25
555
M
2
2/4/1995
444
1
2/8/1995
Operating
Systems
Oracle
DBMS
4
2009
35
5
2017
50
• Write a SQL query to display the information including title, name (person name), and PID of all the books which have been read (StartDate) in the year 2015, and the price of these
books is less than 50. Convert the generated SQL query into a Relational algebra query. Then, draw the optimized query tree (fifth step of query optimization).
Note: You can draw a tree on a paper, scan, and upload in the Moodle OR you can describe tree stepwise like English sentences starting from leaf node (first step) to upwards](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6f8f11a0-ca39-4f9e-9aaa-00d52ea0eab5%2Fd24a14f1-22ed-453c-84d1-c3f5dcea6a3a%2Fhxhmtbs_processed.png&w=3840&q=75)
Transcribed Image Text:Consider the following Books database which is used to keep track of books and their readers. Assume that the database is composed of the following three relations where the key
attributes are underlined.
BOOK
Title
PERSON
READS
PID
111
111
222
333
444
BID
PID
111
Gender
BookID
StartDate
2/4/2015
PYear Price
Name
2
Internet
programming
Database
System
Programmin
g using C++
1
2016
50
Sami
M
3
2/6/2015
8/4/2017
Khawla
Rawan
Zainab
Khamis
222
2
2013
45
4
333
444
2
2/6/2015
3
2011
25
555
M
2
2/4/1995
444
1
2/8/1995
Operating
Systems
Oracle
DBMS
4
2009
35
5
2017
50
• Write a SQL query to display the information including title, name (person name), and PID of all the books which have been read (StartDate) in the year 2015, and the price of these
books is less than 50. Convert the generated SQL query into a Relational algebra query. Then, draw the optimized query tree (fifth step of query optimization).
Note: You can draw a tree on a paper, scan, and upload in the Moodle OR you can describe tree stepwise like English sentences starting from leaf node (first step) to upwards
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