Design an ER schema for a database application described as following: • A project (identified by its unique Project-Number, a project name, and a start date) consists of several work packages (a work package is described by a unique WP-number, a description, a start date, and a due date). • Work packages are structured into a hierarchical work breakdown structure, whereby a work package can be subdivided into several further work packages, while each work package is subordinated to exactly one work package. • One or more employees are assigned to each work package, whereby employees can also be employed in several work packages. An Employee described by its unique ID, a name, an address a phone number and many qualifications. Employees are uniquely assigned to departments. • A department number and a name uniquely identify a department. It also has a location, a manager and a phone number. • Each project has an employee as a responsible person; however, an employee can also have responsibility for several projects.
Design an ER schema for a database application described as following: • A project (identified by its unique Project-Number, a project name, and a start date) consists of several work packages (a work package is described by a unique WP-number, a description, a start date, and a due date). • Work packages are structured into a hierarchical work breakdown structure, whereby a work package can be subdivided into several further work packages, while each work package is subordinated to exactly one work package. • One or more employees are assigned to each work package, whereby employees can also be employed in several work packages. An Employee described by its unique ID, a name, an address a phone number and many qualifications. Employees are uniquely assigned to departments. • A department number and a name uniquely identify a department. It also has a location, a manager and a phone number. • Each project has an employee as a responsible person; however, an employee can also have responsibility for several projects.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Design an ER schema for a database application described as following:
• A project (identified by its unique Project-Number, a project name, and a start date) consists of several work packages (a work package is described by a unique WP-number, a description, a start date, and a due date).
• Work packages are structured into a hierarchical work breakdown structure, whereby a work package can be subdivided into several further work packages, while each work package is subordinated to exactly one work package.
• One or more employees are assigned to each work package, whereby employees can also be employed in several work packages. An Employee described by its unique ID, a name, an address a phone number and many qualifications. Employees are uniquely assigned to departments.
• A department number and a name uniquely identify a department. It also has a location, a manager and a phone number.
• Each project has an employee as a responsible person; however, an employee can also have responsibility for several projects.
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Recommended textbooks for you
![Database System Concepts](https://www.bartleby.com/isbn_cover_images/9780078022159/9780078022159_smallCoverImage.jpg)
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
![Starting Out with Python (4th Edition)](https://www.bartleby.com/isbn_cover_images/9780134444321/9780134444321_smallCoverImage.gif)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
![Digital Fundamentals (11th Edition)](https://www.bartleby.com/isbn_cover_images/9780132737968/9780132737968_smallCoverImage.gif)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
![Database System Concepts](https://www.bartleby.com/isbn_cover_images/9780078022159/9780078022159_smallCoverImage.jpg)
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
![Starting Out with Python (4th Edition)](https://www.bartleby.com/isbn_cover_images/9780134444321/9780134444321_smallCoverImage.gif)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
![Digital Fundamentals (11th Edition)](https://www.bartleby.com/isbn_cover_images/9780132737968/9780132737968_smallCoverImage.gif)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
![C How to Program (8th Edition)](https://www.bartleby.com/isbn_cover_images/9780133976892/9780133976892_smallCoverImage.gif)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
![Database Systems: Design, Implementation, & Manag…](https://www.bartleby.com/isbn_cover_images/9781337627900/9781337627900_smallCoverImage.gif)
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
![Programmable Logic Controllers](https://www.bartleby.com/isbn_cover_images/9780073373843/9780073373843_smallCoverImage.gif)
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education