Представления

CREATE VIEW student
AS
SELECT teachers.last_name, teachers.first_name, teachers.middle_name
FROM teachers

SELECT * FROM student



CREATE VIEW otdel_zarp
AS
SELECT last_name, SUM(teaching_load.hours*form_of_class.pay_per_hour) AS salary
FROM teachers, teaching_load,form_of_class
WHERE teachers.teacher_code=teaching_load.teacher_code AND
form_of_class.form_code=teaching_load.form_code
GROUP BY teachers.last_name,teaching_load.hours,
form_of_class.form_code, form_of_class.pay_per_hour

SELECT MIN(salary) FROM otdel_zarp