q13

select
    c_count,
    count(*) as custdist
from
    (
        select
            c_custkey,
            count(o_orderkey) as c_count
        from
            customer left outer join orders on
                c_custkey = o_custkey
                and o_totalprice :varies
        group by
            c_custkey
    )
group by
    c_count
order by
    custdist desc,
    c_count desc