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
				('12', '17', '21', '20', '15', '26', '10')
			and c_acctbal > (
				select
					avg(c_acctbal)
				from
					customer
				where
					c_acctbal > 0.00
					and substr(c_phone, 1, 2) in
						('12', '17', '21', '20', '15', '26', '10')
			)
			and not exists (
				select
					*
				from
					orders
				where
					o_custkey = c_custkey
			)
	) as vip
group by
	cntrycode
order by
	cntrycode;
 cntrycode | numcust | totacctbal  
-----------+---------+-------------
 10        |   90658 | 6.79496e+08
 12        |   90770 | 6.80961e+08
 15        |   91041 |  6.8229e+08
 17        |   91281 | 6.84865e+08
 20        |   91107 |  6.8339e+08
 21        |   90856 | 6.81405e+08
 26        |   90522 | 6.78881e+08
(7 rows)

COMMIT;
COMMIT