题解 | 查询连续入住多晚的客户信息？
查询连续入住多晚的客户信息？
https://www.nowcoder.com/practice/5b4018c47dfd401d87a5afb5ebf35dfd
select user_id,room_id,room_type,days from( select c.user_id,c.room_id,g.room_type, datediff(c.checkout_time ,c.checkin_time) as days from guestroom_tb g join checkin_tb c on g.room_id = c.room_id)a where a.days>1 order by days,room_id,user_id desc
记住datediff(c.checkout_time ,c.checkin_time)
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