Data environment IBL The company Internet Big Library (abbr. IBL) was established in the year 2000. The most important tables of the IBL information system are as follows. Books (bid, author, title, publisher, year, notes); Members (mid, name, surname, street, city, country, birthday, phone, notes); Borrow (rid, bid, mid, date, notes); a) (10%) Write an expression in tuple relational calculus that selects the authors and titles of books borrowed last year by members from Izola. a) (15%) Write an expression in relational algebra that retrieves the names, surnames, and addresses of members that have borrowed all books of the author Knuth.
Data environment IBL The company Internet Big Library (abbr. IBL) was established in the year 2000. The most important tables of the IBL information system are as follows. Books (bid, author, title, publisher, year, notes); Members (mid, name, surname, street, city, country, birthday, phone, notes); Borrow (rid, bid, mid, date, notes); a) (10%) Write an expression in tuple relational calculus that selects the authors and titles of books borrowed last year by members from Izola. a) (15%) Write an expression in relational algebra that retrieves the names, surnames, and addresses of members that have borrowed all books of the author Knuth.
Principles of Information Systems (MindTap Course List)
12th Edition
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Ralph Stair, George Reynolds
Chapter5: Database Systems And Applications
Section: Chapter Questions
Problem 11SAT
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Transcribed Image Text:Data environment IBL
The company Internet Big Library (abbr. IBL) was established in the year 2000. The most
important tables of the IBL information system are as follows.
Books (bid, author, title, publisher, year, notes);
Members (mid, name, surname, street, city, country, birthday, phone, notes);
Borrow (rid, bid, mid, date, notes);
Transcribed Image Text:a) (10%) Write an expression in tuple relational calculus that selects the authors and titles
of books borrowed last year by members from Izola.
a) (15%) Write an expression in relational algebra that retrieves the names, surnames, and
addresses of members that have borrowed all books of the author Knuth.
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