What type of control is designed to provide an alternative to normal controls that for some reason cannot be used.?

Which of the following statements is an example of a SELF JOIN?

A) SELECT department_id, department_name,location_id, city FROM departments NATURAL JOIN locations; B) SELECT e.employee_id, e.last_name, e.department_id, d.department_id, d.location_id FROM employees e JOIN departments d ON (e.department_id = d.department_id); C) SELECT e.employee_id, e.last_name, e.department_id, d.department_id, d.location_id FROM employees e JOIN departments d ON (e.department_id = d.department_id) AND e.manager_id = 149 ; D) SELECT worker.last_name emp, manager.last_name mgr FROM employees worker JOIN employees manager ON (worker.manager_id = manager.employee_id);

The ________ tool enables you to create a user-interface which works on the Internet

Fill in the blank(s) with correct word