select product_id, round(sum(if_click)/count(*),3) as ctr, round(sum(if_cart)/sum(if_click),3) as cart_rate, round(sum(if_payment)/sum(if_cart),3) as payment_rate, round(sum(if_refund)/sum(if_payment),3) as refund_rate from tb_user_event where left(event_time,7) = '2021-10' grou...