学生管理系统数据库php

CREATE TABLE students (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100),
    age INT,
    gender ENUM('Male', 'Female'),
    email VARCHAR(100)
);

CREATE TABLE courses (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100),
    teacher VARCHAR(100)
);

CREATE TABLE grades (
    student_id INT,
    course_id INT,
    grade DECIMAL(5, 2),
    PRIMARY KEY (student_id, course_id),
    FOREIGN KEY (student_id) REFERENCES students(id),
    FOREIGN KEY (course_id) REFERENCES courses(id)
);

<?php
$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "student_management";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

$sql = "INSERT INTO students (name, age, gender, email) VALUES ('张三', 20, 'Male', 'zhangsan@example.com')";

if ($conn->query($sql) === TRUE) {
    echo "新记录插入成功";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>