Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 5, Problem 7P
Explanation of Solution
Crow’s Foot ER diagram for FlyRight Aircraft Maintenance division of the FlyRight Company:
The following data model shows the solution for the given question.
Explanation:
- In the above data model, the disjoint constraint (d) is used as a category symbol. Here the “Employee” supertype entity has optional subtypes. The primary of “Employee” entity is “Emp_No”...
Expert Solution & Answer
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The FlyRight Aircraft Maintenance (FRAM) division of the FlyRight Company (FRC) performs all maintenance for FRC's aircraft. Produce a data model segment that reflects the following business rules:
All mechanics are FRC employees. Not all employees are mechanics.
Some mechanics are specialized in engine (EN) maintenance. Others are specialized in airframe (AF) maintenance or avionics (AV) maintenance. (Avionics are the electronic components of an aircraft that are used in communication and navigation.) All mechanics take periodic refresher courses to stay current in their areas of expertise. FRC tracks all courses taken by each mechanic—date, course type, certification (Y/N), and performance.
FRC keeps an employment history of all mechanics. The history includes the date hired, date promoted, and date terminated. Given those requirements, create the Crow's Foot ERD segment.
To upload and submit your assignment, click the Choose File button below to find and select your saved…
A manufacturing company produces products. The following product information is stored: product name, product ID and quantity on hand. These products are made up of many components. Each component can be supplied by one or more suppliers. The following component information is kept: component ID, name, description, suppliers who supply them, and products in which they are used.
Create an ERD to show how you would track this information.
Show entity names (5m), primary keys (5m), attributes for each entity (5m), relationships between the entities (4m) and cardinality (4m).
Assumptions
A supplier can exist without providing components.
A component does not have to be associated with a supplier.
A component does not have to be associated with a product. Not all components are used in products.
A product cannot exist without components.
pls help me : Draw an ER diagram databse management for hospital according to the following requirements:Department - stores information about hospital departments, including department ID and department name.
Staff - stores information about doctors and nurses, including staff ID, staff name, and department ID (foreign key referencing Department entity).
Patient - stores information about patients, including patient ID, patient name, gender, date of birth, and address.
Visit - stores information about each patient visit, including visit ID, patient ID (foreign key referencing Patient entity), medical record ID, clinic ID, doctor ID (foreign key referencing Staff entity), assistant nurse ID (foreign key referencing Staff entity), and visit date.
Medical Record - stores information about each medical record, including medical record ID and visit ID (foreign key referencing Visit entity).
Test - stores information about each test ordered by the doctor, including test ID, test name, and…
Chapter 5 Solutions
Database Systems: Design, Implementation, & Management
Ch. 5 - Prob. 1RQCh. 5 - What kinds of data would you store in an entity...Ch. 5 - Prob. 3RQCh. 5 - What is a subtype discriminator? Give an example...Ch. 5 - Prob. 5RQCh. 5 - What is the difference between partial...Ch. 5 - Prob. 7RQCh. 5 - According to the data model, is it required that...Ch. 5 - Prob. 9RQCh. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - When implementing a 1:1 relationship, where should...Ch. 5 - What is time-variant data, and how would you deal...Ch. 5 - Prob. 16RQCh. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8CCh. 5 - Prob. 9CCh. 5 - Prob. 10C
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Similar questions
- A college course may have one or more scheduled sections or may not have a scheduled section. Attributes of COURSE include Course ID, Course Name, and Units. Attributes of SECTION include Section Number and Semester ID. Semester ID is composed of two parts: Semester and Year. Section Number is an integer (such as 1 or 2) that distinguishes one section from another for the same course but does not uniquely identify a section. How did you model SECTION? Why did you choose this way versus alternative ways to model SECTION?arrow_forwardThe entity type STUDENT has the following attributes: Student Name, Address, Phone, Age, Activity, and No of Years. Activity represents some campus-based student activity, and No of Years represents the number of years the student has engaged in this activity. A given student may engage in more than one activity. Draw an ERD for this situation. What attribute or attributes did you designate as the identifier for the STUDENT entity? Why?arrow_forwardA manufacturing company produces products. The following product information is stored: product name, product ID and quantity on hand. These products are made up of many components. Each component can be supplied by one or more suppliers. The following component information is kept: component ID, name, description, suppliers who supply them, and products in which they are used. Create an ERD to show how you would track this information. Show entity names, primary keys, attributes for each entity, and relationships between the entities. Assumptions: • A supplier can exist without providing components. • A component does not have to be associated with a supplier. • A component does not have to be associated with a product. Not all components are used in products. • A product cannot exist without components.arrow_forward
- Exercise 3 Manufacturer A manufacturing company produces products. The following product information is stored: product name, product ID and quantity on hand. These products are made up of many components. Each component can be supplied by one or more suppliers. The following component information is kept: component ID, name, description, suppliers who supply them, and products in which they are used. Create an ERD to show how you would track this information. Show entity names, primary keys, attributes for each entity, relationships between the entities and cardinality. Assumptions A supplier can exist without providing components. A component does not have to be associated with a supplier. A component does not have to be associated with a product. Not all components are used in products. A product cannot exist without components. List of Entities and the Attributes List of Relationship and Cardinalities Draw the Conceptual Model Draw the Logical Model with…arrow_forwardA manufacturing company produces products. The following product information is stored: product name, product ID and quantity on hand. These products are made up of many components. One or more suppliers can supply each component. The following component information is kept: component ID, name, description, suppliers who supply them, and products in which they are used. Create an ERD to show how you would track this information. Show entity names, primary keys, attributes for each entity, relationships between the entities and cardinality. Assumptions: A supplier can exist without providing components. A component does not have to be associated with a supplier. A component does not have to be associated with a product. Not all components are used in products. A product cannot exist without components.arrow_forwardAcme Airlines ERD Create an Entity Relationship Diagram in Vertabelo from the business rules shown below. Make sure each entity has all attributes and relationships as well as any appropriate annotations. Please print your ERD to PDF and submit to the Assignment 5 link. Please check your file before submitting to make sure it is viewable. The Acme Airline Company has a fleet of small planes that can be chartered by customers to fly either passengers or cargo across the country: a CUSTOMER may book zero or more CHARTERS and each CHARTER must be booked by one CUSTOMER an AIRCRAFT may be used for zero or more CHARTERS and each CHARTER must use a single AIRCRAFT a CHARTER will have one or more EMPLOYEES on the flight and each EMPLOYEE may fly on zero or more CHARTERS Since the relationship between CHARTER and EMPLOYEE is many-to-many, use a composite entity called CREW to break it up. A CHARTER will have one or more CREW members and each EMPLOYEE can be on zero or more CREWS for a CUSTOMER…arrow_forward
- In an ERD, entities do not have columns. Instead which of the following is used to describe the entity's characteristics? Group of answer choices attributes degrees instances relationshipsarrow_forwardGarden Glory is a partnership that provides gardening and yard maintenance services to individuals and organizations. Garden Glory is owned by two partners. They employ two office administrators and a number of full- and part-time gardeners. Garden Glory will provide one-time garden services, but it specializes in ongoing service and maintenance. Many of its customers have multiple buildings, apartments, and rental houses that require gardening and lawn maintenance services. Create a sample list of owners and properties. Your list will be similar in structure to that in Figure 1-34 g, but it will concern owners and properties rather than owners and pets. Your list should include, at a minimum, owner name, phone, and billing address, as well as property name, type, and address. B. Describe modification problems that are likely to occur if Garden Glory attempts to maintain the list in a spreadsheet. C. Split the list into tables such that each has only one theme. Create appropriate…arrow_forward
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