query: SELECT id FROM Highschooler EXCEPT SELECT student_id FROM Friend
question: Are Showing ids of all students which do ain't no friends.
query_toks: SELECT id FROM Highschooler EXCEPT SELECT student_id FROM Friend
query_toks_no_value: select id from highschooler except select student_id from friend
question_toks: Are Showing ids of all students which do ain't no friends.