#淦了俩小时 with t1 as( select order_id, customer_id, product_id, sum(quantity) quantity, concat(year(order_date),'-',month(order_date)) order_date from orders where year(order_date) = 2023 group by order_id,customer_id,product_id,concat(year(order_date),'-',month(order_date))), t2 as( select t1.product_...