在两个日期之间选择php mysql

如何解决在两个日期之间选择php mysql

我有一个非常简单的SQL，这使我发疯。 我正在与汽车租赁公司合作-因此有一个FromDate和ToDate（已预订的汽车）

我的MySQL如下所示：

id | FromDate | ToDate
-----------------------
24 | 01.10.2020 | 31.10.2020

因此，如果用户在两者之间选择一个日期，他应该收到一条消息，提示该车已被预订。到目前为止，我已经尝试过：

SELECT id FROM booked_cars WHERE ($fromdate BETWEEN date(FromDate) AND date(ToDate)) AND vhId = $vhid
SELECT id FROM booked_cars WHERE ($fromdate BETWEEN date(FromDate) AND date(ToDate) AND $todate BETWEEN date(FromDate) AND date(ToDate)) AND vhId = $vhid
SELECT id FROM booked_cars WHERE (date(FromDate) BETWEEN $fromdate AND $todate) AND vhId = $vhid

我的$ fromdate，$ todate和$ vhid带有POST-Form。 值是

$fromdate = 03.10.2020
$todate = 07.10.2020
$vhid = 24

无论我尝试什么，我的$ statement-> rowCount（）始终为零。

我正在将PDO与准备好的语句一起使用。我只是为了更好的阅读而写的。

$statement = $pdo->prepare("SELECT id FROM booked_cars WHERE (:fromdate BETWEEN date(FromDate) AND date(ToDate)) AND vhId = :vhid");
$statement->execute(array('fromdate' => $fromdate,'vhid' => $vhid));
echo $statement->rowCount(); // Alway 0 with BETWEEN (when i select just the vhid,i got the result)

解决方法

您需要在此处使用STR_TO_DATE，数据库中保存的日期很可能具有YYYY-mm-dd格式。

$statement = $pdo->prepare("SELECT `id` FROM `booked_cars` WHERE `vhId` = :vhid AND STR_TO_DATE(:fromdate,'%d.%m.%Y') BETWEEN `FromDate` AND `ToDate`;");

如果字段FromDate和ToDate的类型为DATETIME：

$statement = $pdo->prepare("SELECT `id` FROM `booked_cars` WHERE `vhId` = :vhid AND STR_TO_DATE(:fromdate,'%d.%m.%Y') BETWEEN DATE(`FromDate`) AND DATE(`ToDate`);");

上面的查询类似于此DB Fiddle example中使用的查询。