题解 | #牛客的课程订单分析(四)#

select user_id,min(date) first_buy_date,count(user_id) cnt
from order_info
where date > '2025-10-15'
and product_name in ('C++','Java','Python')
and status = 'completed'
group by user_id
having count(user_id) > 1
order by user_id

日期在2025-10-15知乎，选课为('C++','Java','Python')，购买成功.一个用户下单2个以及2个以上

where date > '2025-10-15'
and product_name in ('C++','Java','Python')
and status = 'completed'
group by user_id
having count(user_id) > 1