题解 | 分析客户逾期情况
分析客户逾期情况
https://www.nowcoder.com/practice/22633632da344e2492973ecf555e10c9
select
ct.pay_ability,
concat(round((sum(case when lt.overdue_days is not null then 1 else 0 end) / count(lt.customer_id))*100 ,1),'%') as overdue_ratio
from customer_tb ct
inner join loan_tb lt
on lt.customer_id = ct.customer_id
group by ct.pay_ability
order by overdue_ratio desc
标记：concat用于拼接字符