select re.`Customer Name`,re.sum_val from( SELECT c2.NAME as "Customer Name",sum(c.bal) as sum_val FROM Card as c left join Customer as c2 on c.ID = c2.ID where c2.CITY = "beijing" GROUP BY c.ID ) as re where re.sum_val = ( SELECT max(sum_value) from( SELECT sum(c3.bal) as sum_va...