我想在sql中的两个日期之间进行搜索

Question

我有两张桌子，这个桌子名称是“room”，另一张是“预订”

我现在加入了两张桌子，当我在

之间搜索时，我想要值

book_form = "2016-12-30"和book_to = "2016-12-31"

它将返回true，因为这两个日期在“预订”表中不存在，并且在搜索之间

book_form = "2016-12-30"和book_to = "2017-01-05" 或book_form = "2017-01-03"和book_to = "2017-01-15"

它将返回false，因为此日期存在于预订表中。

这是我的疑问。

select * from rooms join room_book on rooms.room_id = room_book.room_id 
where status = 'available' and room_book.book_from NOT BETWEEN '2016-12-30' 
AND room_book.book_to NOT BETWEEN '2016-12-31'

Answer 1

Kishan Patel的答案将返回两个日期之间的所有记录。因此，如果你想要一个真或假，如果两个日期之间有空房，你可以这样做：

SELECT IF(COUNT(*) > 0, TRUE, FALSE) AS NewResult
from rooms 
join room_book on rooms.room_id = room_book.room_id
where status = 'available' 
and room_book.book_from >= '2016-12-30' AND room_book.book_to <= '2016-12-31'

Answer 2

尝试这一次返回两个日期之间的所有记录

select * from rooms 
join room_book on rooms.room_id = room_book.room_id
where status = 'available' 
and room_book.book_from >= '2016-12-30' AND room_book.book_to <= '2016-12-31'

确保它对您有用