Question

我需要一个验证功能来检查可用的酒店客房（用于指定的地点/酒店和指定的日期/时间段，可能是指定的房间类型。

我在想这样的事情，但是我还没有使它起作用：

$sql="SELECT *
FROM bookings
WHERE date_begin <= '$checkin' AND date_end >= '$checkout'

表格

CREATE TABLE user 
  ( 
     username VARCHAR(20), 
     password VARCHAR(20), 
     PRIMARY KEY(username) 
  ); 

CREATE TABLE hotel 
  ( 
     hotelname VARCHAR(30) NOT NULL, 
     place     VARCHAR(30), 
     PRIMARY KEY(hotelname) 
  ); 

CREATE TABLE roomtype 
  ( 
     roomtype VARCHAR(30) NOT NULL, 
     PRIMARY KEY(roomtype) 
  ); 

CREATE TABLE hotelroomtype 
  ( 
     hotelname     VARCHAR(40), 
     roomtype      VARCHAR(50), 
     numberofrooms INT(3), 
     PRIMARY KEY (hotelname, roomtype), 
     FOREIGN KEY(hotelname) REFERENCES hotel(hotelname), 
     FOREIGN KEY(roomtype) REFERENCES roomtype(roomtype) 
  ); 

CREATE TABLE room 
  ( 
     hotelname  VARCHAR(40), 
     roomtype   VARCHAR(50), 
     roomnumber INT(3), 
     PRIMARY KEY (hotelname, roomnumber), 
     FOREIGN KEY(hotelname, roomtype) REFERENCES hotelroomtype(hotelname, 
     roomtype) 
  ); 

CREATE TABLE bookings 
  ( 
     orderid       INT(1000) auto_increment, 
     username      VARCHAR(40), 
     hotelname     VARCHAR(50), 
     roomtype      VARCHAR(3), 
     numberofrooms INT(3), 
     checkin       DATE, 
     checkout      DATE, 
     PRIMARY KEY(orderid), 
     FOREIGN KEY(username) REFERENCES user(username), 
     FOREIGN KEY(hotelname) REFERENCES hotel(hotelname) 
  );

如何验证酒店预订系统

0 个答案: