Using the instance of the Airport database, formulate the following queries in the relational algebra: 1)Display the number of all carriers and the average of their revenues. 2)Display the minimum, the average, and the maximum distances of the flights that are scheduled on October 17th, 2017? 3)Display, for each carrierID, the number of flights and the average of their distances. Example: List all airport names. π name Airport Uploaded more examples on how to do it below:

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
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Using the instance of the Airport database, formulate the following queries in the relational
algebra:

1)Display the number of all carriers and the average of their revenues.

2)Display the minimum, the average, and the maximum distances of the flights that are
scheduled on October 17th, 2017?

3)Display, for each carrierID, the number of flights and the average of their distances.

Example: List all airport names.

π name Airport

Uploaded more examples on how to do it below:

1.
2.
3.
List all book titles.
Ititle (Book)
List full details of all books that are currently available.
available='y' (Book)
List the name and age of all users under age 18.
Iname, age (Gage<18 (User))
4. List the title, the year and the availability of all books published after 1960.
IItitle, year, available (year>1960 (Book))
Transcribed Image Text:1. 2. 3. List all book titles. Ititle (Book) List full details of all books that are currently available. available='y' (Book) List the name and age of all users under age 18. Iname, age (Gage<18 (User)) 4. List the title, the year and the availability of all books published after 1960. IItitle, year, available (year>1960 (Book))
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