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(t.date)as first_buy_date, count(product_name) as cnt
from order_info t
where t.date>"2025-10-15"
and status="completed"
and product_name in ('C++', 'Python', 'Java')
group by user_id
) t1
where cnt>=2
order by user_id
;
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