MySQL中创建数据库和表：

sql -- 创建数据库 CREATE DATABASE campus_attendance DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; USE campus_attendance;

-- 创建学生表 CREATE TABLE student ( id INT PRIMARY KEY AUTO_INCREMENT, name VARCHAR(50) NOT NULL, student_id VARCHAR(20) NOT NULL UNIQUE, class VARCHAR(50), major VARCHAR(100) );

-- 创建用户表 CREATE TABLE user ( id INT PRIMARY KEY AUTO_INCREMENT, username VARCHAR(50) NOT NULL UNIQUE, password VARCHAR(100) NOT NULL, role VARCHAR(20) NOT NULL );

-- 插入测试数据 INSERT INTO student (name, student_id, class, major) VALUES ('张三', '2023001', '计算机1班', '计算机科学与技术'), ('李四', '2023002', '软件1班', '软件工程');

INSERT INTO user (username, password, role) VALUES ('admin', 'admin123', 'ADMIN'), ('teacher1', 'teacher123', 'TEACHER');