Question

我正在尝试做一个简单的预订系统，我想有一个SQL查询来检查日期是否可用以及日期范围内没有日期。

示例：此日期为：2016-01-01 - ＆gt; 2016年1月8日我必须查看日期：

2015-12-25 - 2016-01-03
2015-12-25 - 2016-01-20
2016-01-04 - 2016-01-06
2016-01-04 - 2016-01-10
2016-01-01 - 2016-01-08

这些是我想到的场景。但在研究时，所有的例子都有2套日期需要检查。所有方案都不是从数据库中检查未知日期。我搞不清楚了。如果有人可以提供帮助我会很感激。也许你过去曾经使用过这个场景。

Answer 1

当s1＆lt; = e2和e1＆gt; = s2时，两个句点（s1，e1）和（s2，e2）重叠：

SELECT * FROM tab
WHERE checkInDate <= DATE '2016-01-03' AND checkOutDate >= DATE '2015-12-25';

当s1＆lt; = s2和e1＆gt; = e2时，句点（s1，e1）中的句点（s2，e2）包含：

SELECT * FROM tab
WHERE checkInDate <= DATE '2015-12-25' AND checkOutDate >= DATE '2016-01-03';

fiddle

Answer 2

For future reference for anyone who has this problem, here is how I solved my issue :

$query  = "SELECT * FROM booking WHERE ";
        $query .= "checkInDate >= $chkInDate AND checkOutDate >= $chkOutDate OR ";
        $query .= "checkInDate >= $chkInDate AND checkOutDate <= $chkOutDate OR ";
        $query .= "checkInDate <= $chkInDate AND checkOutDate >= $chkOutDate OR ";
        $query .= "checkInDate <= $chkInDate AND checkOutDate <= $chkOutDate OR ";
        $query .= "checkInDate =  $chkInDate AND checkOutDate  = $chkOutDate ";

Answer 3

适用于我和我的查询的示例。它始终准确无误。

canvas.getAnimator().setUpdateFPSFrames(60, null);

使用这些功能：

SET @PerBeg = ’2010-01-01’;
SET @PerEnd = ’2010-01-31’;

SELECT  
    Reservation.ArrivalDate AS ArrivalDate, 
    Reservation.DepartureDate AS DepartureDate, 
. . . 

WHERE

fBoolActyInPeriod(ArrivalDate,DepartureDate,@PerBeg,@PerEnd)

Answer 4

你可以这样做：

SELECT * FROM reserves r
WHERE 
    start_dt < '2016-01-03' and end_date > '2015-12-25'
or start_dt < '2016-01-20' and end_date > '2016-01-04'
or start_dt < '2016-01-06' and end_date > '2016-01-04'
or start_dt < '2016-01-10' and end_date > '2016-01-04'
or start_dt < '2016-01-08' and end_date > '2016-01-01'
LIMIT 1

如果有任何记录返回，则这些日期有保留。您可以在应用程序中以编程方式创建此SQL，无论您需要哪个句点。

如果您需要查看此期间的储备金，请删除LIMIT 1条款。

检查日期是否属于范围日期

4 个答案: