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Consider the relation schemas: Computer (c) → Model, Manufacturer, Price, Speed User (u) → Name, ComputerModel Employee (e) → Name, WeeklySalary a. Find all users such that the average price of their computers is greater than 2000 and their speed is at least 1000MHZ. Provide a solution that uses no nested queries but does use HAVING. b. Find every manufacturer who makes at least one computer whose price is more than the average weekly salary of the users who use computers from that manufacturer.

Consider the relation schemas: Computer (c) → Model, Manufacturer, Price, Speed User (u) → Name, ComputerModel Employee (e) → Name, WeeklySalary a. Find all users such that the average price of their computers is greater than 2000 and their speed is at least 1000MHZ. Provide a solution that uses no nested queries but does use HAVING. b. Find every manufacturer who makes at least one computer whose price is more than the average weekly salary of the users who use computers from that manufacturer.

Database System Concepts
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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Consider the relation schemas: Computer (c) → Model, Manufacturer, Price, Speed User (u) → Name, ComputerModel Employee (e) → Name, WeeklySalary a. Find all users such that the average price of their computers is greater than 2000 and their speed is at least 1000MHZ. Provide a solution that uses no nested queries but does use HAVING. b. Find every manufacturer who makes at least one computer whose price is more than the average weekly salary of the users who use computers from that manufacturer.
Transcribed Image Text:Consider the relation schemas: Computer (c) → Model, Manufacturer, Price, Speed User (u) → Name, ComputerModel Employee (e) → Name, WeeklySalary a. Find all users such that the average price of their computers is greater than 2000 and their speed is at least 1000MHZ. Provide a solution that uses no nested queries but does use HAVING. b. Find every manufacturer who makes at least one computer whose price is more than the average weekly salary of the users who use computers from that manufacturer.
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