/*Write a query to display the employee id, name ( first name and last name ), SalaryDrawn, AvgCompare (salary - the average
 salary of all employees) and the SalaryStatus column with a title HIGH and LOW respectively for those employees whose
  salary is more than and less than the average salary of all employees.

*/

    SELECT  employee_id,  first_name, last_name,  salary AS SalaryDrawn,    
    ROUND((salary -(SELECT AVG(salary) FROM employees)),2) AS AvgCompare,    
    CASE  WHEN salary >=   
    (SELECT AVG(salary)   
    FROM employees) THEN 'HIGH'    
    ELSE 'LOW'    
    END AS SalaryStatus   
    FROM employees;  