题解 | #国庆期间近7日日均取消订单量#
国庆期间近7日日均取消订单量
http://www.nowcoder.com/practice/2b330aa6cc994ec2a988704a078a0703
select *
from(select dt,
round(sum(finish_num)over(order by dt rows 6 preceding)/7,2) as finish_num_7d,
round(sum(cancel_num)over(order by dt rows 6 preceding)/7,2) as cancel_num_7d
from(select date(order_time) dt,
sum(case when start_time is not null then 1 else 0 end) as finish_num,
sum(case when start_time is null then 1 else 0 end) as cancel_num
from tb_get_car_order
group by date(order_time)
order by dt) t ) a
where dt between '2021-10-01' and '2021-10-03'
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