在PHP MsSQL中检查可用性和房间预订

下面是我的SQL代码

$find=mysqli_query($dbconn,"
SELECT *
  FROM room 
 WHERE room_no NOT IN 
   (SELECT room_no 
    FROM reservation 
   WHERE check_in<='$check_out' 
      AND check_out>='$check_in');

我也尝试过这个sql代码。但同样的结果

$find=mysqli_query($dbconn,"SELECT * FROM room WHERE room_no NOT IN (SELECT room_no FROM reservation WHERE(check_out>='$check_in' AND check_in<='$check_out')OR(check_out<='$check_in' AND check_in>='$check_out'))");

---

如果您想允许在同一天签出和签入，您只需允许范围满足；更改。

您能否提供您的房间和预订表的示例数据，以及$check\u out和$check\u in的值？您好。谢谢你的回答。我已经编辑了这个问题。所以你没有考虑预订表中的时间？我认为您的签入和签出字段类型为DATEYes。是约会。如何添加签入时间和签出时间并进行检查？将您的签入和签出字段类型设置为datetime或timestamp，以便您可以将时间与日期一起存储。所以首先要这样做

$find=mysqli_query($dbconn,"SELECT * FROM room WHERE room_no NOT IN (SELECT room_no FROM reservation WHERE(check_out>='$check_in' AND check_in<='$check_out')OR(check_out<='$check_in' AND check_in>='$check_out'))");