如何從表中獲取不在其他表中的記錄？

Question

我有兩個表，即 roominfo和guestrecordtransac ... roominfo containd ROOM_ID，room_no和roomtype領域 而guestrecordtransac包含ID，roomtype，roomno，checkindate，checkoutdate領域

我試過這樣

select room_no FROM roominfo WHERE room_no NOT IN (select roomno from guestrocordtransac where roomtype='".$roomtype."' between '".$check_in."' and '".$check_out."' 
) and roomtype='".$roomtype."' 

我想room_no從特定類型的房間信息，並且不在登記和結帳日期之間

Answer 1

（您的問題不清楚，請嘗試給予更明確的信息）

我覺得這有點像你需要/問什麼：

select room_no FROM roominfo WHERE room_no NOT IN (select roomno from 
guestrocordtransac where roomtype='".$roomtype."' 
AND CURDATE() between '".$check_in."' and '".$check_out."`'