思路：count()over
select
id
,user_id
,product_name
,status
,client_id
,date
from 
(
    select
    *
    ,count(user_id)over(partition by user_id) total
    from order_info
    where date > '2025-10-15'
    and status = 'completed'
    and product_name in ('C++','Java','Python')
) a
where total>=2
order by id