酒店管理系统sql代码

酒店管理系统的SQL代码非常复杂，因为它涉及到多个表格和多个功能模块。以下是一个简单的示例，仅供参考：

1. 酒店信息表格的创建

CREATE TABLE hotel_info (
    hotel_id int PRIMARY KEY,
    hotel_name varchar(100),
    hotel_address varchar(200),
    hotel_phone varchar(20),
    hotel_email varchar(100)
);

2. 客房信息表格的创建

CREATE TABLE room_info (
    room_id int PRIMARY KEY,
    room_type varchar(50),
    room_price decimal(10, 2),
    room_status int,
    hotel_id int,
    FOREIGN KEY (hotel_id) REFERENCES hotel_info(hotel_id)
);

3. 客户信息表格的创建

CREATE TABLE customer_info (
    customer_id int PRIMARY KEY,
    customer_name varchar(50),
    customer_phone varchar(20),
    customer_email varchar(100)
);

4. 预订信息表格的创建

CREATE TABLE booking_info (
    booking_id int PRIMARY KEY,
    customer_id int,
    room_id int,
    booking_date date,
    checkin_date date,
    checkout_date date,
    FOREIGN KEY (customer_id) REFERENCES customer_info(customer_id),
    FOREIGN KEY (room_id) REFERENCES room_info(room_id)
);

5. 查询空房间的SQL代码

SELECT room_id, room_type, room_price
FROM room_info
WHERE room_status = 0;

6. 预订客房的SQL代码

INSERT INTO booking_info (customer_id, room_id, booking_date, checkin_date, checkout_date)
VALUES (1, 101, '2021-08-01', '2021-08-10', '2021-08-15');

以上是一个简单的酒店管理系统的SQL代码示例，实际的系统会更加复杂，涉及到更多的表格和功能模块。