Principles of Information Systems (MindTap Course List)
12th Edition
ISBN: 9781285867168
Author: Ralph Stair, George Reynolds
Publisher: Cengage Learning
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Chapter 5, Problem 14RQ
Explanation of Solution
Projecting: It is a type of manipulating data by eliminating columns in a table.
Joining: It is a type of manipulating data by combining two or more tables.
Difference between projecting and joining:
| Projecting | Joining |
| It is one of the types of manipulating data by eliminating columns in a table. |
It is one of the types of manipulating data by combining two or more tables. |
|
If the user want to create new table by eliminating certain columns of old table then the user can use projection concept... |
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8. Cash RegisterThis exercise assumes you have created the RetailItem class for Programming Exercise 5. Create a CashRegister class that can be used with the RetailItem class. The CashRegister class should be able to internally keep a list of RetailItem objects. The class should have the following methods:
A method named purchase_item that accepts a RetailItem object as an argument. Each time the purchase_item method is called, the RetailItem object that is passed as an argument should be added to the list.
A method named get_total that returns the total price of all the RetailItem objects stored in the CashRegister object’s internal list.
A method named show_items that displays data about the RetailItem objects stored in the CashRegister object’s internal list.
A method named clear that should clear the CashRegister object’s internal list.
Demonstrate the CashRegister class in a program that allows the user to select several items for purchase. When the user is ready to check out, the…
5. RetailItem ClassWrite a class named RetailItem that holds data about an item in a retail store. The class should store the following data in attributes: item description, units in inventory, and price.
Once you have written the class, write a program that creates three RetailItem objects and stores the following data in them:
Description Units in Inventory PriceItem #1 Jacket 12 59.95Item #2 Designer Jeans 40 34.95Item #3 Shirt 20 24.95
Chapter 5 Solutions
Principles of Information Systems (MindTap Course List)
Ch. 5.6 - Prob. 1DQCh. 5.6 - Prob. 2DQCh. 5.6 - Prob. 1CTQCh. 5.6 - Prob. 2CTQCh. 5.7 - Prob. 1DQCh. 5.7 - Prob. 2DQCh. 5.7 - Prob. 1CTQCh. 5.7 - Prob. 2CTQCh. 5 - Prob. 1SATCh. 5 - Prob. 2SAT
Ch. 5 - Prob. 3SATCh. 5 - Prob. 4SATCh. 5 - Prob. 5SATCh. 5 - Prob. 6SATCh. 5 - Prob. 7SATCh. 5 - Prob. 8SATCh. 5 - ______ is a special-purpose programming language...Ch. 5 - Prob. 10SATCh. 5 - Prob. 11SATCh. 5 - Prob. 12SATCh. 5 - Prob. 13SATCh. 5 - Prob. 14SATCh. 5 - An in-memory database (IMDB) is a database...Ch. 5 - Prob. 16SATCh. 5 - Prob. 17SATCh. 5 - Prob. 18SATCh. 5 - Prob. 19SATCh. 5 - Prob. 20SATCh. 5 - Prob. 1RQCh. 5 - What is the difference between a data attribute...Ch. 5 - Prob. 3RQCh. 5 - Prob. 4RQCh. 5 - Prob. 5RQCh. 5 - Prob. 6RQCh. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - Prob. 10RQCh. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - Prob. 16RQCh. 5 - Prob. 17RQCh. 5 - Prob. 18RQCh. 5 - What is data mining? What is OLAP? How are they...Ch. 5 - Prob. 20RQCh. 5 - Prob. 21RQCh. 5 - Prob. 1DQCh. 5 - Outline some specific steps an organization might...Ch. 5 - Briefly describe the ACID properties to which an...Ch. 5 - Prob. 4DQCh. 5 - Prob. 5DQCh. 5 - Prob. 6DQCh. 5 - Prob. 7DQCh. 5 - Prob. 8DQCh. 5 - Prob. 9DQCh. 5 - Prob. 10DQCh. 5 - Prob. 11DQCh. 5 - Prob. 12DQCh. 5 - Prob. 13DQCh. 5 - Prob. 1PSECh. 5 - An online video movie rental store is using a...Ch. 5 - Using a graphics program, develop an...Ch. 5 - Prob. 1WECh. 5 - Prob. 1CECh. 5 - Prob. 2CECh. 5 - Prob. 1DQ1Ch. 5 - Prob. 2DQ1Ch. 5 - Prob. 1CTQ1Ch. 5 - Prob. 2CTQ1Ch. 5 - Prob. 1DQ2Ch. 5 - Prob. 2DQ2Ch. 5 - Prob. 1CTQ2Ch. 5 - Prob. 2CTQ2Ch. 5 - Prob. 1DQ3Ch. 5 - Prob. 2DQ3Ch. 5 - Prob. 1CTQ3Ch. 5 - Prob. 2CTQ3
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