Using MIS (10th Edition)
10th Edition
ISBN: 9780134606996
Author: David M. Kroenke, Randall J. Boyle
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 5.1UYK
Draw an entity-relationship diagram that shows the relationships among a
Expert Solution & Answer
Program Plan Intro
E-R model:
- It is a tool for creating data model.
- It is used for developers to describe the content of data model by using two functions called entities and relationships.
Entity:
- It helps the user for tracking something in database.
- Example entities in student database system are Student, Grade, Course, etc.
Relationships:
- Entities have relationships among each other.
- For example, in student database, a Student has a relationship to Major and Student has a relationship to Advisor.
Attribute:
- It used to describe the entity characteristics.
- Example attributes of student entity is Student_id, Student_name, Student_address, etc.
Identifier:
- It is an attribute or group of attribute, but its value is related with one and only one entity instance.
Example of E-R diagram:
Explanation of Solution
Entity Relationship diagram that displays relationship among the database, database application and users:
The below is the E-R diagram that shows the relationship that is laid among the database, database application and users:
User:
The person or end user that can process the application that is stored in the database.
Database application:
A database application is a collection of four elements namely forms, reports, queries and application which acts as an intermediate between the user and data of the database
Database:
Database is a collection of information that is used to store and retrieve the data. Data is organized in tables.
Explanation of the E-R diagram:
- Many user can use the database application.
- Example of the user entity could be “students”, “faculty”.
- Many database applications can be present in a single database.
- Example of the database application could be “Bookstore”,”Library”.
- Only one database can contain many database application.
- Example of the database could be “studentDB”,”BookStoreDB”.
- The relationship between the user and the database application is “M:N (Many to many )relationship.
- The relationship between the database application and theDatbase is “N:1”(Many to One) relationship.
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Chapter 5 Solutions
Using MIS (10th Edition)
Ch. 5.2 - Prob. 1EGDQCh. 5.2 - Prob. 2EGDQCh. 5.2 - Prob. 3EGDQCh. 5.2 - Prob. 4EGDQCh. 5.2 - Prob. 5EGDQCh. 5.2 - Prob. 6EGDQCh. 5.2 - Prob. 7EGDQCh. 5.2 - Consider the adage Never ask a question for which...Ch. 5.3 - Prob. 1SAQCh. 5.3 - Prob. 2SAQ
Ch. 5.3 - Prob. 3SAQCh. 5.3 - Prob. 4SAQCh. 5.8 - Prob. 1SGDQCh. 5.8 - Prob. 3SGDQCh. 5.8 - Prob. 4SGDQCh. 5.8 - Prob. 5.1ARQCh. 5.8 - Prob. 5.2ARQCh. 5.8 - Prob. 5.3ARQCh. 5.8 - Prob. 5.4ARQCh. 5.8 - How are data models used for database development?...Ch. 5.8 - Prob. 5.6ARQCh. 5.8 - Prob. 5.7ARQCh. 5.8 - Prob. 5.8ARQCh. 5 - Draw an entity-relationship diagram that shows the...Ch. 5 - Consider the relationship between Adviser and...Ch. 5 - Prob. 5.3UYKCh. 5 - Prob. 5.4UYKCh. 5 - Study Figure 5-28 to understand the entities and...Ch. 5 - Working with your team, develop a list of seven...Ch. 5 - Modify the E-R model in Figure 5-28 to include a...Ch. 5 - Discuss the advantages and disadvantages of the...Ch. 5 - Transform the data model in Figure 5-28 into a...Ch. 5 - Prob. 5.1CE5Ch. 5 - Fill your database with sample data. Because you...Ch. 5 - Prob. 5.12CE5Ch. 5 - Explain why a one-table database could be stored...Ch. 5 - Prob. 5.14CS5Ch. 5 - Examine the columns in Figure 5-33. Name three...Ch. 5 - Prob. 5.16CS5Ch. 5 - Prob. 5.17CS5Ch. 5 - Explain the statement A database is an abstraction...Ch. 5 - Prob. 5.19CS5Ch. 5 - Prob. 5.2MMLCh. 5 - Prob. 5.21MML
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