Question

我需要根据date_begin和date_end字段选择所有预订。我有一个日历，只显示所选日期日历的10天。

2017-05-15    -> Date chosen by user
2017-05-10    -> Date begin
2017-05-20    -> Date end

目前我的查询如下：

SELECT *
FROM bookings
WHERE ((date_begin >= '2017-05-10' AND date_begin <= '2017-05-20') OR 
       (date_end >= '2017-05-10' AND date_end <= '2017-05-20'))

现在，所发生的事情是90％的预订确实会在日历上显示并且有效，但有一个 if 。

如果预订超过10天（这是日历的限制），则只会在日历中显示：

日历中存在date_begin或
日历中存在date_end

这意味着在某些日期之间日历中存在差距。

2017-05-15    -> Date chosen by user
2017-05-10    -> Date begin
2017-05-20    -> Date end
2017-05-11    -> Date begin reservation
2017-05-27    -> Date end reservation
Shows in calendar? Yes

2017-05-16    -> Date chosen by user
2017-05-11    -> Date begin
2017-05-22    -> Date end
2017-05-11    -> Date begin reservation
2017-05-27    -> Date end reservation
Shows in calendar? Yes

2017-05-17    -> Date chosen by user
2017-05-12    -> Date begin
2017-05-23    -> Date end
2017-05-11    -> Date begin reservation
2017-05-27    -> Date end reservation
Shows in calendar? No!

2017-05-18    -> Date chosen by user
2017-05-13    -> Date begin
2017-05-24    -> Date end
2017-05-11    -> Date begin reservation
2017-05-27    -> Date end reservation
Shows in calendar? No!

2017-05-21    -> Date chosen by user
2017-05-16    -> Date begin
2017-05-27    -> Date end
2017-05-11    -> Date begin reservation
2017-05-27    -> Date end reservation
Shows in calendar? Yes

如何改善查询？

Answer 1

我认为你正在尝试这样做。

SELECT *
FROM bookings
WHERE date_begin <= '2017-05-20' AND date_end >= '2017-05-10'

Answer 2

Linesofcode-
这个讨论 datetime应该有效。
(StartDate1 <= EndDate2) and (StartDate2 <= EndDate1)
感谢Ian Nelson

MySQL - 根据日期预订

2 个答案: