psql -X 2>&1 <<'SQL'
BEGIN;
UPDATE rekening SET saldo = saldo - 100000 WHERE id = 1;
SELECT id, nama, saldo FROM rekening WHERE id = 1;
UPDATE rekening SET saldo = saldo + 100000 WHERE id = 3;
ROLLBACK;
SELECT id, nama, saldo FROM rekening WHERE id = 1;
SQL