select /*+ parallel(a) */ min(action_objid) from TMP_OA a;
select /*+ parallel(a) */ max(action_objid) from TMP_OA a;

partition 1=min(action_objid) +  1* (max(action_objid) /10)
partition 2=min(action_objid) +  2* (max(action_objid) /10)  -partition 1
....
partition 10=min(action_objid) +  10* (max(action_objid) /10) - all nine partitions