Question

我在数据库中有两个表

房间：包含房间的详细信息
预订：包含有关房间的预订信息

房间：

+----+----------+---------------+---------+
| id | hotel_id | room_category | room_no |
+----+----------+---------------+---------+
|  1 |        1 | delux         |       1 |
|  2 |        1 | delux         |       2 |
|  3 |        1 | delux         |       3 |
|  4 |        1 | delux         |       4 |
|  5 |        1 | delux         |       5 |
+----+----------+---------------+---------+

预定：

+----+------------+----------+---------------+--------------+---------------+---------+----------------+
| id | booking_id | hotel_id | room_category | checkin_date | checkout_date | room_no | booking_status |
+----+------------+----------+---------------+--------------+---------------+---------+----------------+
|  1 |          1 |        1 | delux         | 2016-08-25   | 2016-08-30    |       1 | y              |
|  2 |          2 |        1 | delux         | 2016-08-25   | 2016-08-28    |       2 | y              |
+----+------------+----------+---------------+--------------+---------------+---------+----------------+

现在我写一个查询：

select * from rooms
 where
 hotel_id =1 and
      room_category="delux" 
       and id not in(

select room_no
from bookings 
where 
       checkin_date between '2016-08-25' and '2016-08-28'
       or
       checkout_date between '2016-08-25' and '2016-08-28'

       );

问题： 1.从26-27结果搜索可用性时，包含1号和2号房间

Answer 1

检查重叠时段的通常逻辑是：begin_1 < end_2 and end_1 >= begin_2因为酒店房间可以在前一个预订结束的同一天预订。

select * from rooms
where hotel_id =1 
  and room_category="delux" 
  and id not in
   (
     select room_no
     from bookings  
     where checkin_date  < '2016-08-28'
       and checkout_date >= '2016-08-25'
   );

Sql搜索日期范围之间的日期

1 个答案: