delete from rider_session where rider_id=12;
delete from rider_session where rider_id=2;
delete from rider_session where rider_id=13;
delete from rider_session where rider_id=11;

delete from rider_schedule where rider_id=12;
delete from rider_schedule where rider_id=2;
delete from rider_schedule where rider_id=13;
delete from rider_schedule where rider_id=11;

delete from rider where id=12;
delete from rider where id=2;
delete from rider where id=13;
delete from rider where id=11;

delete from hub where id=1;
delete from hub where id=2;
delete from hub where id=4;