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
				('19', '13', '21', '30', '23', '15', '18')
			and c_acctbal > (
				select
					avg(c_acctbal)
				from
					customer
				where
					c_acctbal > 0.00
					and substr(c_phone, 1, 2) in
						('19', '13', '21', '30', '23', '15', '18')
			)
			and not exists (
				select
					*
				from
					orders
				where
					o_custkey = c_custkey
			)
	) as vip
group by
	cntrycode
order by
	cntrycode;
 cntrycode | numcust | totacctbal  
-----------+---------+-------------
 13        |    9017 | 6.75525e+07
 15        |    9031 | 6.78123e+07
 18        |    9201 | 6.92676e+07
 19        |    9077 | 6.81724e+07
 21        |    9067 | 6.81797e+07
 23        |    8975 | 6.75629e+07
 30        |    9334 | 7.00739e+07
(7 rows)

COMMIT;
COMMIT