题解 | #牛客的课程订单分析(三)#
牛客的课程订单分析(三)
https://www.nowcoder.com/practice/4ae8cff2505f4d7cb68fb0ec7cf80c57
先用（二）筛选出user_id，然后主表用同等的where限制条件就可以了
select * from order_info
where date >= '2025-10-15' and status = 'completed' and product_name in('C++','Java','Python') and user_id in
(select user_id from order_info
where date >= '2025-10-15' and status = 'completed' and product_name in('C++','Java','Python')
group by user_id
having count(user_id) >= 2
order by user_id)
order by id
