A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
expand_more
expand_more
format_list_bulleted
Expert Solution & Answer
Chapter 2, Problem 1RQ
Explanation of Solution
Entity:
Entity refers to the basic building block of data collected regarding a person, place, event, or thing.
- Entity can be defined as an object in the system that has to be modelled and about which information has to be stored.
- The property of entity refers to attribute and the association between entities refers to a relationship.
- Rectangles with either round or square corners are used to represent an entity.
- Entity is described by a singular noun spelled in capital letters.
- Some common examples of entities are Employee, Student, Lecturer, etc.
Example of entity:
The example of an entity is given below:
- Student – the student is the name of the person, who collects the details of the student information. Therefore, here the STUDENT acts as an entity.
- Lecturer - the lecturer is the person name, who collects the details of lecturer information. Therefore, here the Lecturer acts as an entity.
- Department - the department is the person name that collects the details of department information. So, here the Department acts as an entity.
The following example shows “Student” entity, “Lecturer” entity, and “Department” entity of the “college”
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
Please solve and answer the question correctly please. Thank you!!
Please solve and answer the question correctly please. Thank you!!
W
AutoSave
Off
File
Home Insert
Draw Design
Assignment_1[1] - Protected...
■ Saved V
> Search
Layout
References
Mailings Review View Help QuillBot
RefWorks - RCM
PROTECTED VIEW Be careful-files from the Internet can contain viruses. Unless you need to edit, it's safer to stay in Protected View.
Enable Editing
PR
Comments Viewing
Share
×
2. The following state transition table is a simplified model of process management,
with the labels representing transitions between states of READY, RUN,
BLOCKED, and NONRESIDENT.
READY
RUN
BLOCKED
NONRESIDENT
READY
RUN
-
1
-
5
BLOCKED
2
4
3
-
6
Give an example of an event that can cause each of the above transitions. Draw a
diagram if that helps. (5)
Page 2 of 4
20 of 278 words
Text Predictions: On
64
f
W
Focus
+ 170%
ENG
US
17:13
2025/03/24
Chapter 2 Solutions
A Guide to SQL
Ch. 2 - Prob. 1RQCh. 2 - What is an attribute?Ch. 2 - What is a relationship? What is a one-to-many...Ch. 2 - Prob. 4RQCh. 2 - What is a relation?Ch. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - How do you qualify the name of a field, and when...Ch. 2 - Prob. 9RQCh. 2 - What is a primary key? What is the primary key for...
Ch. 2 - Prob. 11RQCh. 2 - Prob. 12RQCh. 2 - Define second normal form. What types of problems...Ch. 2 - Define third normal form. What types of problems...Ch. 2 - Prob. 15RQCh. 2 - Prob. 16RQCh. 2 - List the changes you would need to make to your...Ch. 2 - Prob. 1TDCh. 2 - Prob. 2TDCh. 2 - Prob. 3TDCh. 2 - Prob. 4TDCh. 2 - Prob. 5TDCh. 2 - Prob. 1CATCh. 2 - Identify the functional dependencies in the...Ch. 2 - Prob. 3CATCh. 2 - Determine the functional dependencies that exist...Ch. 2 - Prob. 2SCGCh. 2 - Prob. 3SCG
Knowledge Booster
Similar questions
- I need help understanding how could I got the IP Address for the Last Host on this Subnet & the Broadcast Address for this Subnetarrow_forwardI need help understanding how could I got the IP Address for the Last Host on this Subnet & the Broadcast Address for this Subnetarrow_forwardPlease answer Java OOP homework scenario below: You have been hired by the National Insurance Company to create a program to track insurance policies for all its customers. National Insurance provides three types of insurance: automobile, home and life insurance. The program should be able to track up to 100 policies. Based on the provided information, create an efficient, object-oriented solution with good design principles that will allow a user to manage policies. To do this, the solution should have a menu with the following capabilities: Add Policy o This capability will allow a user to add a policy. The user should specify if the policy is for home, auto, or life. Once the type of policy has been selected, the user should be prompted for all required fields for the policy type. Remove Policy o This capability will allow a user to select any policy and remove it from the list. View policies o This capability will allow a user to see all the policies. All policy fields…arrow_forward
- What are the two errors in my pseudocode?Module getAverage(Integer value1, Integer value2, Integer value3) Declare Integer average average = value1 + value2 + value3 / 3 Display average End Modulearrow_forwardWhere did I make an error in my pseudocode module???Code:Module main() Call raiseToPower(2, 1.5) End main Module raiseToPower(Real value, Integer power) Declare Real result Set result = value ^ power Display result End raiseToPowerarrow_forwardWhy does my pseudocode not perform what I asked? Don't know whats wrong with it.// This program asks the user to enter a value // between 1 and 10 and validates the input. Declare Integer value // Get a value from the user. Display "Enter a value between 1 and 10." Input value // Make sure the value is between 1 and 10. While value < 1 AND value > 10 Display "ERROR: The value must be between 1 and 10." Display "Enter a value between 1 and 10." Input value End Whilearrow_forward
- What's wrong with my pseudocode? // The calcDiscountPrice function accepts an item’s price and // the discount percentage as arguments. It uses those // values to calculate and return the discounted price. Function Real calcDiscountPrice(Real price, Real percentage) // Calculate the discount. Declare Real discount = price * percentage // Subtract the discount from the price. Declare Real discountPrice = price – discount // Return the discount price. Return discount End Functionarrow_forwardNeed help converting my pseudocode to python, AND have a flowchart showing everything!The code: Function getScore() // Prompt the user to enter a test score Display "Enter a test score as a percentage (0-100): " Input score // Return the score entered by the user Return scoreEnd Function Function getGPAPoint(Integer score) // Determine GPA point based on the score If score >= 90 Then Return 4.0 Else If score >= 80 Then Return 3.0 Else If score >= 70 Then Return 2.0 Else If score >= 60 Then Return 1.0 Else Return 0.0 End IfEnd Function Function getAverage() // Initialize variables to store the sum of scores and GPA points totalScore = 0 totalGPA = 0.0 // Loop to collect 5 test scores For i = 1 to 5 Do score = getScore() // Call getScore function to get a test score totalScore = totalScore + score // Add score to totalScore gpaPoint = getGPAPoint(score) // Convert…arrow_forwardWhere did I make an error in my pseudocode module???Code:Module main() Call raiseToPower(2, 1.5) End main Module raiseToPower(Real value, Integer power) Declare Real result Set result = value ^ power Display result End raiseToPowerarrow_forward
- I need help writing pseudocode for calculating class score average by putting in 5 test scores, and showing the average from all 5 inputs and the GPA score.Starting with 3 functions outside of a main module. The functions are getScore(), getGPAPoint(Integer score), and getAverage(). Function getscore is an input for a grade as a class percentage. Function getGPAPoint will calculate the score into a GPA point and return as a float (values of 90-100 as 4.0, 80-89 as 3.0, 70-79 as 2.0, 60-69 as 1.0, and anything below 60 as 0.) Function averageGPA will finally make a call to both previous functions when the user inputs numbers 5 times that then calculates the average (add up all the scores, divide by 5) and the average grade alongside displaying the average GPA. End result is a main module that makes a proper call to the averageGPA function and display its results. Need help with this!arrow_forwardPlease original work Why is integration between data collection and business analysis so important to success in an organization that uses business analytics? How can a company that is just starting to use business analytics set up its program for success right from the beginning? Please cite in text references and add weblinksarrow_forwardHow to make a 1 bit adder with CLA?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
A Guide to SQLComputer ScienceISBN:9781111527273Author:Philip J. PrattPublisher:Course Technology Ptr
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781305627482Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Principles of Information Systems (MindTap Course...Computer ScienceISBN:9781285867168Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781285196145Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos CoronelPublisher:Cengage Learning
A Guide to SQL
Computer Science
ISBN:9781111527273
Author:Philip J. Pratt
Publisher:Course Technology Ptr
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Cengage Learning