BEGIN;
BEGIN
select
	c_count,
	count(*) as custdist
from
	(
		select
			c_custkey,
			count(o_orderkey)
		from
			customer left outer join orders on
				c_custkey = o_custkey
				and o_comment not like '%express%requests%'
		group by
			c_custkey
	) as c_orders (c_custkey, c_count)
group by
	c_count
order by
	custdist desc,
	c_count desc;
 c_count | custdist 
---------+----------
       0 |   500021
      10 |    66139
       9 |    65128
      11 |    62054
       8 |    58494
      12 |    55956
      13 |    49841
      19 |    46590
      18 |    46295
       7 |    46253
      20 |    45300
      14 |    45158
      17 |    44896
      15 |    43899
      16 |    43884
      21 |    42148
      22 |    38327
       6 |    32829
      23 |    32628
      24 |    26809
      25 |    21106
       5 |    19622
      26 |    16074
      27 |    11783
       4 |     9839
      28 |     8289
      29 |     5677
       3 |     4007
      30 |     3748
      31 |     2315
      32 |     1514
       2 |     1181
      33 |      878
      34 |      509
      35 |      301
       1 |      227
      36 |      126
      37 |       63
      38 |       39
      39 |       25
      40 |       16
      42 |        5
      41 |        5
      45 |        2
(44 rows)

COMMIT;
COMMIT