题解 | #统计2021年10月每个退货率不大于0.5的商品各项指标#
统计2021年10月每个退货率不大于0.5的商品各项指标
http://www.nowcoder.com/practice/cbf582d28b794722becfc680847327be
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 DATE_FORMAT(event_time,'%Y%m') = '202110' group by product_id having refund_rate <= 0.5 order by product_id