An order by count(1) sql after group

select trans_class_cd, count(1) from OPGCEP2.gcal_use_case where use_case_id < 15 group by trans_class_cd order by count(1);


it doesn't matter if count(1) in select is added or not, you can

select trans_class_cd from OPGCEP2.gcal_use_case where use_case_id < 15 group by trans_class_cd order by count(1);

indicates that the set function can be used in order by