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All parts of this question use the following database schema: Flights(flno, from, to, distance) Aircraft(aid, aname, cruisingrange) Certified(eid, aid) Employees(eid, ename, salary) In the above schema, Employees describes all employees, while Certified represents the fact that a given employee is certified to fly a given aircraft. Thus, all employees who are pilots will be listed in Certified (and no other employees will). An aircraft is able to fly a given flight if the aircraft's cruisingrange is at least as great as the flight's distance. Express in both (i) Relational Algebra and (ii) SQL: a) Find the cruisingrange of aircraft that George is certified to fly.

All parts of this question use the following database schema: Flights(flno, from, to, distance) Aircraft(aid, aname, cruisingrange) Certified(eid, aid) Employees(eid, ename, salary) In the above schema, Employees describes all employees, while Certified represents the fact that a given employee is certified to fly a given aircraft. Thus, all employees who are pilots will be listed in Certified (and no other employees will). An aircraft is able to fly a given flight if the aircraft's cruisingrange is at least as great as the flight's distance. Express in both (i) Relational Algebra and (ii) SQL: a) Find the cruisingrange of aircraft that George is certified to fly.

Computer Networking: A Top-Down Approach (7th Edition)
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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All parts of this question use the following database schema: Flights(flno, from, to, distance) Aircraft(aid, aname, cruisingrange) Certified(eid, aid) Employees(eid, ename, salary) In the above schema, Employees describes all employees, while Certified represents the fact that a given employee is certified to fly a given aircraft. Thus, all employees who are pilots will be listed in Certified (and no other employees will). An aircraft is able to fly a given flight if the aircraft's cruisingrange is at least as great as the flight's distance. a) Express in both (i) Relational Algebra and (ii) SQL: Find the cruisingrange of aircraft that George is certified to fly.
Transcribed Image Text:All parts of this question use the following database schema: Flights(flno, from, to, distance) Aircraft(aid, aname, cruisingrange) Certified(eid, aid) Employees(eid, ename, salary) In the above schema, Employees describes all employees, while Certified represents the fact that a given employee is certified to fly a given aircraft. Thus, all employees who are pilots will be listed in Certified (and no other employees will). An aircraft is able to fly a given flight if the aircraft's cruisingrange is at least as great as the flight's distance. a) Express in both (i) Relational Algebra and (ii) SQL: Find the cruisingrange of aircraft that George is certified to fly.
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