1.獲得每個用戶每個訂單信息、購買次數(shù)、按日期的排序select *,count(user_id)over(partition by user_id) cnt,Row_number()over(partition by user_id order by date) r from order_info where DATEDIFF(date,'2025-10-15') >0 and product_name in ('C++','Java','Python') and status ='completed';t1 2.獲得購買次數(shù)為...