What are all details of the students who registered but did not attend any course?
SELECT * FROM student_course_registrations WHERE student_id NOT IN (SELECT student_id FROM student_course_attendance)
SELECT * FROM student_course_registrations WHERE student_id NOT IN (SELECT student_id FROM student_course_attendance)
[{'student_id': 131, 'course_id': 303, 'registration_date': '2008-11-05 10:35:13'}]