QUERY="SELECT students.id_card AS cedula, students.first_name AS nombre, students.last_name AS apellido, students.email AS email, sections.section AS seccion, schedules.description AS horario, rooms.name AS salon FROM students INNER JOIN schedules ON schedules.sched_id = students.schedule_id INNER JOIN rooms ON schedules.room_id = rooms.room_id INNER JOIN sections ON students.class_id = sections.section_id AND students.class_id = $sect AND students.subject_id = $subj;"