/*18. Write a query in SQL to display the full name (first name and last name), hire date, commission percentage, and 
telephone separated by '-', and salary for those employees who earn the salary above 11000 or the seventh digit in their
 phone number equals 3 and make the result set in a descending order by the first name. */
     SELECT first_name ||' '||last_name AS Full_Name, hire_date ,   
      commission_pct, email ||' -  '||phone_number AS Contact_Details, salary   
         FROM employees   
           WHERE salary > 11000  
            OR phone_number LIKE '______3%'  
              ORDER BY first_name DESC;  