Question

I have this sql query, which I have to provide ID to work (it`s 100 in this example)

SELECT * FROM students_subjects WHERE student_id 
NOT IN 
(SELECT student_id FROM students_info WHERE class_id=(SELECT class_id FROM groups WHERE group_id=(SELECT group_id FROM teacher_groups_subjects WHERE t_g_s_id=**100**)))

I want to select all rows from table teacher_groups_subjects and run the query above for each ID (t_g_s_id)

Anyone?

Answer 1

Possibly like this:-

SELECT * 
FROM students_subjects a 
LEFT OUTER JOIN students_info b ON a.student_id = b.student_id
LEFT OUTER JOIN groups c ON b.class_id = c.group_id
LEFT OUTER JOIN teacher_groups_subjects d ON c.group_id = d.group_id
WHERE b.student_id IS NULL