SELECT pay_ability, CONCAT(round((100*sum(yuqi)/count(customer_id)),1),'%') AS overdue_ratio FROM (select sum(case when overdue_days>=1 then 1 else 0 end ) as yuqi, pay_ability, customer_id from loan_tb lt left join customer_tb as ct using(customer_id) group by customer_id ) TEMP1 GROUP BY pay_ab...