SQL大厂笔试真题L3
使用avg(if)来表达符合条件的事件
select c.pay_ability, concat(round(avg(if(overdue_days is null, 0, 1))*100, 1), '%')overdue_ratio from customer_tb as c join loan_tb as l using(customer_id)
group by pay_ability
order by overdue_ratio DESC
03-22 18:50 上海交通大学 数据分析师 发布于上海
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