题解 | #牛客的课程订单分析(四)#
牛客的课程订单分析(四)
https://www.nowcoder.com/practice/c93d2079282f4943a3771ca6fd081c23
select user_id,min(date) first_buy_date,count(1) cnt from order_info where date>"2025-10-15" and status = "completed" and product_name in ("C++","Java","Python") group by user_id having cnt >=2 order by user_id