faculties {
	faculty_id int pk
	faculty_name varchar(100)
}

departments {
	department_id int pk
	faculty_id int > faculties.faculty_id
	department_name varchar(150)
}

groups {
	group_id int pk
	faculty_id int > faculties.faculty_id
	group_name varchar(20)
	course int
}

students {
	student_id int pk
	group_id int > groups.group_id
	last_name varchar(50)
	first_name varchar(50)
	middle_name varchar(50)
	gender varchar(10)
	birth_date date
	scholarship numeric
	has_children bool
}

teachers {
	teacher_id int pk
	department_id int > departments.department_id
	last_name varchar(50)
	first_name varchar(50)
	middle_name varchar(50)
	category varchar(50)
	salary numeric
	academic_degree varchar(50)
}

disciplines {
	discipline_id int pk
	discipline_name varchar(150)
}

semesters {
	semester_id int pk
	semester_number int
	academic_year varchar(20)
}

teaching_assignments {
	assignment_id int pk
	teacher_id int > teachers.teacher_id
	discipline_id int > disciplines.discipline_id
	group_id int > groups.group_id
	semester_id int > semesters.semester_id
	lecture_hours int
	practice_hours int
	lab_hours int
}

exams {
	exam_id int pk
	student_id int > students.student_id
	discipline_id int > disciplines.discipline_id
	teacher_id int > teachers.teacher_id
	semester_id int > semesters.semester_id
	exam_date date
	grade int
}

diploma_works {
	diploma_id int pk
	student_id int > students.student_id
	teacher_id int > teachers.teacher_id
	topic varchar(300)
	defense_date date
}