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,first_buy_date,cnt
from
(select user_id,min(date) first_buy_date,count(status) cnt
from order_info
where status="completed" and date > '2025-10-15'
and product_name in("Python","C++","Java")
group by user_id
having cnt>=2) t
order by user_id asc
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