Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 2, Problem 1RQ
Program Plan Intro
Data Model:
- Data Model refers to the logical inter relationship and the data flow involved between different data elements.
- It defines how data is processed, connected and stored inside the system.
- A data model can be either concrete or abstract.
- It consists of components such as data types, data items, data sources, event sources, and links.
- The three styles of data model are conceptual data model, physical data model, and logical data model.
Expert Solution & Answer
Explanation of Solution
Importance of Data Models:
- The main function of a data model is that they help to understand complexity of real world environment.
- The data model is used by the
database designer to enhance the interaction among designers, application programmers, and end users. - Data models will help to represent the required data and the format that is used for different businesses processes.
- They help to prevent data redundancy.
- The database design tools have made the development of data models to possibly diminish the database design error potential.
- It also helps to eliminate the discrepancies between the database designs components and the real world data environment.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Hands-On Assignments Part II
Assignment 1-5: Querying the DoGood Donor Database
Review the DoGood Donor data by writing and running SQL statements to perform the following
tasks:
1. List each donor who has made a pledge and indicated a single lump sum payment. Include
first name, last name, pledge date, and pledge amount.
2. List each donor who has made a pledge and indicated monthly payments over one year.
Include first name, last name, pledge date, and pledge amount. Also, display the monthly
payment amount. (Equal monthly payments are made for all pledges paid in monthly
payments.)
3. Display an unduplicated list of projects (ID and name) that have pledges committed. Don't
display all projects defined; list only those that have pledges assigned.
4. Display the number of pledges made by each donor. Include the donor ID, first name, last
name, and number of pledges.
5. Display all pledges made before March 8, 2012. Include all column data from the
DD PLEDGE table.
Write a FancyCar class to support basic operations such as drive, add gas, honk horn, and start engine. FancyCar.java is provided with method stubs. Follow each step to gradually complete all methods.
Note: This program is designed for incremental development. Complete each step and submit for grading before starting the next step. Only a portion of tests pass after each step but confirm progress. The main() method includes basic method calls. Add statements in main() as methods are completed to support development mode testing.
Step 0. Declare private fields for miles driven as shown on the odometer (int), gallons of gas in tank (double), miles per gallon or MPG (double), driving capacity (double), and car model (String). Note the provided final variable indicates the gas tank capacity of 14.0 gallons.
Step 1 (2 pts). 1) Complete the default constructor by initializing the odometer to five miles, tank is full of gas, miles per gallon is 24.0, and the model is "Old Clunker". 2)…
Find the error:
daily_sales = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
days_of_week = ['Sunday', 'Monday', 'Tuesday',
'Wednesday', 'Thursday', 'Friday',
'Saturday']
for i in range(7):
daily_sales[i] = float(input('Enter the sales for ' \
+ day_of_week[i] + ': ')
Chapter 2 Solutions
Database Systems: Design, Implementation, & Management
Ch. 2 - Prob. 1RQCh. 2 - What is a business rule, and what is its purpose...Ch. 2 - How do you translate business rules into data...Ch. 2 - Prob. 4RQCh. 2 - Explain how the entity relationship (ER) model...Ch. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - Prob. 8RQCh. 2 - Prob. 9RQCh. 2 - Prob. 10RQ
Ch. 2 - What is a relationship, and what three types of...Ch. 2 - Give an example of each of the three types of...Ch. 2 - What is a table, and what role does it play in the...Ch. 2 - Prob. 14RQCh. 2 - Prob. 15RQCh. 2 - Prob. 16RQCh. 2 - Prob. 17RQCh. 2 - Prob. 18RQCh. 2 - Prob. 19RQCh. 2 - Prob. 20RQCh. 2 - Prob. 21RQCh. 2 - Prob. 22RQCh. 2 - Prob. 23RQCh. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Using Figure P2.6 as your guide, work Problems 68....Ch. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Typically, a hospital patient receives medications...Ch. 2 - Prob. 10PCh. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17P
Knowledge Booster
Similar questions
- Find the error: daily_sales = [0.0, 0,0, 0.0, 0.0, 0.0, 0.0, 0.0] days_of_week = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'] for i in range(7): daily_sales[i] = float(input('Enter the sales for ' \ + days_of_week[i] + ': ')arrow_forwardFind the error: daily_sales = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] days_of_week = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'] for i in range(6): daily_sales[i] = float(input('Enter the sales for ' \ + days_of_week[i] + ': '))arrow_forwardWhat are the steps you will follow in order to check the database and fix any problems with it and normalize it? Give two references with your answer.arrow_forward
- What are the steps you will follow in order to check the database and fix any problems with it? Have in mind that you SHOULD normalize it as well. Consider that the database offline is not allowed since people are connected to it and personal data might be bridged and not secured. Provide three refernces with you answer.arrow_forwardShould software manufacturers should be tolerant of the practice of software piracy in third-world countries to allow these countries an opportunity to move more quickly into the information age? Why or why not?arrow_forwardI would like to know about the features of Advanced Threat Protection (ATP), AMD-V, and domain name space (DNS).arrow_forward
- I need help to resolve the following activityarrow_forwardModern life has been impacted immensely by computers. Computers have penetrated every aspect of oursociety, either for better or for worse. From supermarket scanners calculating our shopping transactionswhile keeping store inventory; robots that handle highly specialized tasks or even simple human tasks,computers do much more than just computing. But where did all this technology come from and whereis it heading? Does the future look promising or should we worry about computers taking over theworld? Or are they just a necessary evil? Provide three references with your answer.arrow_forwardWhat are the steps you will follow in order to check the database and fix any problems with it? Have in mind that you SHOULD normalize it as well. Describe in full, consider the following:• Taking the database offline is not allowed since people are connected to it.• Personal data might be bridged and not secured. Provide three refernces with you answerarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Fundamentals of Information SystemsComputer ScienceISBN:9781337097536Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
Management Of Information SecurityComputer ScienceISBN:9781337405713Author:WHITMAN, Michael.Publisher:Cengage Learning,
Principles of Information Systems (MindTap Course...Computer ScienceISBN:9781285867168Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
Principles of Information Systems (MindTap Course...Computer ScienceISBN:9781305971776Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781305627482Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Fundamentals of Information Systems
Computer Science
ISBN:9781337097536
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Management Of Information Security
Computer Science
ISBN:9781337405713
Author:WHITMAN, Michael.
Publisher:Cengage Learning,
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781305971776
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning