Consider the following database scheme Employee (SSN, fname, Iname, salary, deptno)/ Department (deptno, dname, total_salary) Where total salary is a derived attribute that represents the total salary of employees working in a specific department. • Write a trigger to compute the total_salary in the event of inserting one or more new employee record(s) in the employee table.
Consider the following database scheme Employee (SSN, fname, Iname, salary, deptno)/ Department (deptno, dname, total_salary) Where total salary is a derived attribute that represents the total salary of employees working in a specific department. • Write a trigger to compute the total_salary in the event of inserting one or more new employee record(s) in the employee table.
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
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Question
Consider the following
Employee (SSN, fname, lname, salary, deptno)
Department (deptno, dname, total_salary)
Where total salary is a derived attribute that represents the total salary of employees working in a specific department.
- Write a trigger to compute the total_salary in the event of inserting one or more new employee record(s) in the employee table.
![Consider the following database scheme
Employee (SSN, fname, Iname, salary, deptno)/
Department (deptno, dname, total_salary)
Where total salary is a derived attribute that represents the total salary of
employees working in a specific department.
Write a trigger to compute the total_salary in the event of inserting one or
more new employee record(s) in the employee table.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8e4c6251-4096-46fd-94af-a0d78ec4c683%2F9c619b6b-b53a-43e2-af54-58547e4f7789%2Flkuhgxq_processed.png&w=3840&q=75)
Transcribed Image Text:Consider the following database scheme
Employee (SSN, fname, Iname, salary, deptno)/
Department (deptno, dname, total_salary)
Where total salary is a derived attribute that represents the total salary of
employees working in a specific department.
Write a trigger to compute the total_salary in the event of inserting one or
more new employee record(s) in the employee table.
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
Step 1
- Employee salary (Emp Salary) has an impact on the overall department salary.
- First, let me tell you the Total_Salary of the department is directly dependent on the employee's salary. If the salary of an employee will change then the total salary of the employee will also be changed because the department
- Total_Salary is the sum of all employer's salaries in that department.
- Dept_No also affects the Total_Salary of the department
- If the department number of an employee is changed or the employee is transferred to some other department.
- So the total number of an employee in the department will be changed. Because when an employee leave’s old department then a total number of an employee in that department is decreased and the sum of salary of all employee in that department also decreases. The same thing when an employee joins a new department and the total number of employees in that department increases so the total sum salary of all employees in that department also increases. That is why Dept_No is also affecting the Total_Salary of the department
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