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

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