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 |    66230
       9 |    65046
      11 |    62127
       8 |    58511
      12 |    55696
      13 |    49908
      19 |    46640
       7 |    46277
      18 |    46254
      14 |    45327
      20 |    45202
      17 |    44793
      16 |    43929
      15 |    43810
      21 |    42215
      22 |    38393
       6 |    32819
      23 |    32618
      24 |    26753
      25 |    21273
       5 |    19575
      26 |    15991
      27 |    11775
       4 |     9912
      28 |     8250
      29 |     5678
       3 |     3994
      30 |     3744
      31 |     2335
      32 |     1518
       2 |     1186
      33 |      882
      34 |      510
      35 |      290
       1 |      230
      36 |      128
      37 |       69
      38 |       37
      39 |       29
      40 |       11
      41 |        7
      42 |        5
      45 |        2
(44 rows)

COMMIT;
COMMIT