Do I have any function/way to divide the rows into un-equal size buckets?

Question

Just like the function NTILE divides the rows into almost equal size buckets, do we have any way to divide the rows into un-equal (randomly decide) buckets so that eg. I can get 4 rows in bucket_1, 38 rows in bucket_2, 17 in bucket_3, ..... Only things is that each bucket should have rows from 1 to 50. (fixed limit).

Answer 1

with source_table as (select object_type, object_name from all_objects where rownum <= 100),
     t            as (select rownum as rn, s.* from source_table s),
     cnt          as (select count(*) cnt from t),
     bucket       as
     ( select bucket_id, bucket_width,
           sum(bucket_width) over (order by bucket_id) - bucket_width + 1 as rn_start
         from
         ( select level as bucket_id, ceil(dbms_random.value(0, 50)) as bucket_width
             from cnt
             connect by level <= cnt
select bucket_id, object_type, object_name from t, bucket
  where rn between rn_start and rn_start + bucket_width - 1
  order by bucket_id
;