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*from
(select user_id,min(date) as first_buy_date,count(*) as cnt
from order_info
where status='completed' and date>'2025-10-15'
and product_name in('C++','Java','Python')
group by user_id) sub
where cnt>=2
order by user_id
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