题解 | #10月的新户客单价和获客成本#

where (uid,date(event_time)) in (select uid,min(date(event_time)) dt
from tb_order_overall
where status=1
group by uid
having date_format(dt,'%Y-%m')='2021-10')),
t2 as (select order_id,sum(price) as self_price
from tb_order_detail
group by order_id)
select round(avg(total_amount),1) as avg_amount,
round(avg(self_price-total_amount),1) as avg_cost
from t1
join t2
on t1.order_id = t2.order_id