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 null then 0 else 1 end) as finish_num, sum(case when start_time is null then 1 else 0 end) as cancel_num from tb_get_car_order where date(order_time) between '2021-09-25' and '2021-10-03' group by date(order_time) order by dt) as t1) t2 where dt between '2021-10-01' and '2021-10-03'

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