Consider a DB schema consisting of the following relation schemes: USING MYSQL R

Question

Consider a DB schema consisting of the following relation schemes:

USING MYSQL

Regions (Region_ID, Region_Name)

Countries (Country_id, Country_Name, Region_Id)

Locations (Location_Id, Street_address, Postal_code, City, State_Province, Country_Id)

Jobs (Job_Id, Job_title, Min_Salary, Max_salary)

Departments (Dep_Id, Dep_Name, Manager_Id, Location_Id)

Employees (Emp_ID, FirstName, Last_Name, E-mail, Phone_number, Hire_date, Job_Id, Salary, Comsn_pct, Manager_Id, Dep_Id)

Employee_History (Emp_ID, Joining_date, last_date, Job_ID, Dep_ID)

6. Create a trigger to ensure that a salary of an employee cannot exceed the salary of his/her manager. If the employee does not have a manager, then his/her salary cannot be more than 10% of the highest salary in the database.

7. For changes in the job of an employee, updated details provided below must be written to Employee History: hire date of the employee for start date, old job ID, old department ID, Employee ID, todays' system date for end date. In case a row is already present for employee job history then the start date must be the end date of that (row +1).

8. Make a Trigger to ensure that the salary of the employee is never decreased while working in an organization.

9. Create a trigger to ensure that an increase of salary for an employee is conform with the following rules: If experience is more than 8 years, increase salary by max 20%; If experience is greater than 3 years, increase salary by max of 10%; Otherwise a max increase of 5%.

10. Create a trigger to ensure that Min_salary cannot exceed Max_salary for any job.

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