BEGIN;
BEGIN
select
	cntrycode,
	count(*) as numcust,
	sum(c_acctbal) as totacctbal
from
	(
		select
			substr(c_phone, 1, 2) as cntrycode,
			c_acctbal
		from
			customer
		where
			substr(c_phone, 1, 2) in
				('13', '25', '30', '24', '29', '17', '16')
			and c_acctbal > (
				select
					avg(c_acctbal)
				from
					customer
				where
					c_acctbal > 0.00
					and substr(c_phone, 1, 2) in
						('13', '25', '30', '24', '29', '17', '16')
			)
			and not exists (
				select
					*
				from
					orders
				where
					o_custkey = c_custkey
			)
	) as vip
group by
	cntrycode
order by
	cntrycode;
 cntrycode | numcust | totacctbal  
-----------+---------+-------------
 13        |    9030 | 6.76174e+07
 16        |    8983 | 6.73137e+07
 17        |    9084 | 6.81695e+07
 24        |    8953 | 6.71196e+07
 25        |    9121 | 6.84108e+07
 29        |    9216 | 6.91003e+07
 30        |    9355 | 7.01789e+07
(7 rows)

COMMIT;
COMMIT