Use our different case studies databases i.e. DreamHome, Northwind etc. and write the nested queries to generate the following information.

1. Write a query to find the names (first_name, last_name) of the employees who have a manager and work for a department based in the United States.
   Hint : Write single-row and multiple-row subqueries
2. Write a query to find the names (first_name, last_name) of the employees who are managers.
3. Write a query to find the names (first_name, last_name), the salary of the employees whose salary is greater than the average salary.
4. Write a query to find the names (first_name, last_name), the salary of the employees whose salary is equal to the minimum salary for their job grade.
5. Write a query to find the names (first_name, last_name), the salary of the employees who earn more than the average salary and who works in any of the IT departments.
6. Write a query to find the names (first_name, last_name), the salary of the employees who earn more than Mr. Bell.
7. Write a query to find the names (first_name, last_name), the salary of the employees who earn the same salary as the minimum salary for all departments.
8. Write a query to find the names (first_name, last_name), the salary of the employees whose salary greater than the average salary of all departments.
9. Write a query to find the names (first_name, last_name) and salary of the employees who earn a salary that is higher than the salary of all the Shipping Clerk (JOB_ID = ’SH_CLERK’). Sort the results of the salary of the lowest to highest.
10. Write a query to find the names (first_name, last_name) of the employees who are not supervisors.
11. Write a query to display the employee ID, first name, last names, and department names of all employees.
12. Write a query to display the employee ID, first name, last names, salary of all employees whose salary is above average for their departments.
13. Write a query to fetch even numbered records from employees table.
14. Write a query to find the 5th maximum salary in the employees table.
15. Write a query to find the 4th minimum salary in the employees table.
16. Write a query to select last 10 records from a table.
17. Write a query to list department number, name for all the departments in which there are no employees in the department.
18. Write a query to get 3 maximum salaries.
19. Write a query to get 3 minimum salaries.
20. Write a query to get nth max salaries of employees.Further practice with nested queries