数据库实现

好的，下面是一个简单的图书管理系统的MySQL数据库实现，包含了书籍信息表、借阅记录表和用户信息表。您可以根据这个实现来创建相应的数据库。

1. 首先创建一个名为 `book_management` 的数据库：

CREATE DATABASE book_management;

2. 切换到 `book_management` 数据库：

USE book_management;

3. 创建书籍信息表 `book_info`：

CREATE TABLE book_info (
    book_id INT PRIMARY KEY AUTO_INCREMENT,
    book_name VARCHAR(50) NOT NULL,
    author VARCHAR(50) NOT NULL,
    press VARCHAR(50) NOT NULL,
    publish_date DATE NOT NULL,
    price FLOAT NOT NULL,
    total_amount INT NOT NULL,
    available_amount INT NOT NULL
);

4. 创建借阅记录表 `borrow_record`：

CREATE TABLE borrow_record (
    record_id INT PRIMARY KEY AUTO_INCREMENT,
    book_id INT NOT NULL,
    user_id INT NOT NULL,
    borrow_date DATE NOT NULL,
    return_date DATE NOT NULL,
    FOREIGN KEY (book_id) REFERENCES book_info(book_id),
    FOREIGN KEY (user_id) REFERENCES user_info(user_id)
);

5. 创建用户信息表 `user_info`：

CREATE TABLE user_info (
    user_id INT PRIMARY KEY AUTO_INCREMENT,
    user_name VARCHAR(50) NOT NULL,
    user_type ENUM('student', 'teacher', 'staff') NOT NULL,
    email VARCHAR(50) NOT NULL,
    phone VARCHAR(20) NOT NULL,
    password VARCHAR(50) NOT NULL
);

6. 创建一个管理员用户：

INSERT INTO user_info (user_name, user_type, email, phone, password) VALUES ('admin', 'staff', 'admin@example.com', '123456789', 'admin123');

7. 创建一个普通用户：

INSERT INTO user_info (user_name, user_type, email, phone, password) VALUES ('user', 'student', 'user@example.com', '987654321', 'user123');

8. 插入一些书籍信息：

INSERT INTO book_info (book_name, author, press, publish_date, price, total_amount, available_amount) VALUES ('Java编程思想', 'Bruce Eckel', '机械工业出版社', '2002-03-01', 98, 100, 100);
INSERT INTO book_info (book_name, author, press, publish_date, price, total_amount, available_amount) VALUES ('算法导论', 'Thomas H. Cormen', '机械工业出版社', '2013-05-01', 128, 50, 50);
INSERT INTO book_info (book_name, author, press, publish_date, price, total_amount, available_amount) VALUES ('深入理解JVM', '周志明', '机械工业出版社', '2014-01-01', 89, 80, 80);

9. 模拟借阅和归还操作：

-- 借阅算法导论
UPDATE book_info SET available_amount = available_amount - 1 WHERE book_id = 2;
INSERT INTO borrow_record (book_id, user_id, borrow_date, return_date) VALUES (2, 2, '2021-10-01', '2021-10-15');

-- 查询借阅记录
SELECT * FROM borrow_record;

-- 归还算法导论
UPDATE book_info SET available_amount = available_amount + 1 WHERE book_id = 2;
UPDATE borrow_record SET return_date = '2021-10-16' WHERE book_id = 2 AND user_id = 2 AND return_date = '2021-10-15';

-- 查询借阅记录
SELECT * FROM borrow_record;

以上是一个简单的图书管理系统的MySQL数据库实现，您可以根据实际情况进行修改和补充。