1. Consider the following relation schemas: Department (dnumber, dname, employee count), PK: dnumber. Employee (eid. fname. Iname, salary, dno), PK: eid. FK: dno refs Department. Write triggers in PL/SQL that satisfy the following requirements: The employee count column in the Department table records the current number of employees in each department. You should guarantee that, whenever an employed record is inserted, deleted or updated in the Employee table, the employee count attribute always has the correct value for the affected department(s) in the Departme table. Also, no department in the organization should have an average salary lower than 10,000. When the insertion, deletion or update of an employee record causes the
1. Consider the following relation schemas: Department (dnumber, dname, employee count), PK: dnumber. Employee (eid. fname. Iname, salary, dno), PK: eid. FK: dno refs Department. Write triggers in PL/SQL that satisfy the following requirements: The employee count column in the Department table records the current number of employees in each department. You should guarantee that, whenever an employed record is inserted, deleted or updated in the Employee table, the employee count attribute always has the correct value for the affected department(s) in the Departme table. Also, no department in the organization should have an average salary lower than 10,000. When the insertion, deletion or update of an employee record causes the
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
Please show all work and write it in PL/SQL and copypaste what you have.
![1. Consider the following relation schemas:
Department (dnumber, dname, employee count), PK: dnumber.
Employee (eid. fname. Iname, salary, dno), PK: eid, FK: dno refs Department.
Write triggers in PL/SQL that satisfy the following requirements:
The employee count column in the Department table records the current number of
employees in each department. You should guarantee that, whenever an employee
record is inserted, deleted or updated in the Employee table, the employee count
attribute always has the correct value for the affected department(s) in the Department
table.
Also, no department in the organization should have an average salary lower than
10,000. When the insertion, deletion or update of an employee record causes the
average salary of a department to be lower than 10,000, the corresponding operation
should be cancelled.
You may create additional tables or views if needed.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F92bbf5ca-0f04-4658-8671-93728b4e5b37%2Fe81297c7-0525-4e03-87cf-64eb6cc8103e%2Fuiux1t_processed.png&w=3840&q=75)
Transcribed Image Text:1. Consider the following relation schemas:
Department (dnumber, dname, employee count), PK: dnumber.
Employee (eid. fname. Iname, salary, dno), PK: eid, FK: dno refs Department.
Write triggers in PL/SQL that satisfy the following requirements:
The employee count column in the Department table records the current number of
employees in each department. You should guarantee that, whenever an employee
record is inserted, deleted or updated in the Employee table, the employee count
attribute always has the correct value for the affected department(s) in the Department
table.
Also, no department in the organization should have an average salary lower than
10,000. When the insertion, deletion or update of an employee record causes the
average salary of a department to be lower than 10,000, the corresponding operation
should be cancelled.
You may create additional tables or views if needed.
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.
This is a popular solution!
Trending now
This is a popular solution!
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