COMPUTER SCIENCE ILLUMIN.-TEXT
7th Edition
ISBN: 9781284156010
Author: Dale
Publisher: Jones & Barlett
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Expert Solution & Answer
Chapter 9, Problem 72E
Explanation of Solution
Declaration:
- Declaration is used to declare or introduce a variable or identifier and describes its data type in the
programming language. - The identifier must be an object, function, or type within the programming language which can be given with some name but it should not be a keyword or reserved word.
- So the programmer refers the identifier by using that name.
- Declaration is used to instruct the compiler which determines an identifier with a name...
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Students have asked these similar questions
TASK 1: Suppliers
Using domain and tuple relational calculus, find:
1. Find the sids of suppliers who supply some red or green part.
2. Find the sids of suppliers who supply some red part or are at „Koprska cesta 25".
3. Find the sids of suppliers who supply every part.
4. Find the sids of suppliers who supply every red part.
5. Find the sids of suppliers who supply every red or green part.
6. Find the pids of parts supplied by at least two different suppliers.
Relation
Relational schema
Suppliers
SUPPLIERS(sid, sname, address)
Parts
PARTS(pid, pname, color)
Catalog
CATALOG(#sid, #pid, cost)
TASK 2: Airline flight information
Using domain and tuple relational calculus, find:
1. Find the eids of pilots certified for some Boeing aircraft.
2. Find the names of pilots certified for some Boeing aircraft.
3. Find the aids of all aircraft that can be used on non-stop flights from Paris to Vancouver.
4. Find the names of pilots who can operate planes with a range greater than 3,000 miles but are not certified
on any Boeing aircraft.
5. Find the eids of employees who make the highest salary (multiple employees can have highest salary).
Relation
Flights
Aircraft
Certified
Relational schema
FLIGHTS(flno, from, to, distance, departs, arrives)
AIRCRAFT (aid, aname, cruisingrange)
CERTIFIED (#eid, #aid)
Employees
EMPLOYEES(eid, ename, salary)
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);
Chapter 9 Solutions
COMPUTER SCIENCE ILLUMIN.-TEXT
Ch. 9 - Prob. 1ECh. 9 - Prob. 2ECh. 9 - Prob. 3ECh. 9 - Prob. 4ECh. 9 - Prob. 5ECh. 9 - Prob. 6ECh. 9 - Prob. 7ECh. 9 - Prob. 8ECh. 9 - Prob. 9ECh. 9 - Prob. 10E
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