select order_info.id, order_info.is_group_buy, client.name from order_info left join client on order_info.client_id=client.id where order_info.date>'2025-10-15' and order_info.product_name in ('C++','Python','Java') and order_info.status='completed' and order_info.user_id in (select user_id from order_info where date>'2025-10-15' and product_name in ('C++','Python','Java') and status='completed' group by user_id having count(user_id)>=2) order by order_info.id