49 lines
1.8 KiB
SQL
49 lines
1.8 KiB
SQL
-- =============================================
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-- Week 3：学生管理系统数据库初始化脚本
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-- 使用方式：
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-- 1. 打开 MySQL 客户端（命令行或 Navicat/DataGrip）
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-- 2. 复制本文件全部内容并执行
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-- 3. 或：mysql -u root -p < init.sql
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-- =============================================
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-- 创建数据库
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CREATE DATABASE IF NOT EXISTS week3_student
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DEFAULT CHARACTER SET utf8mb4
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DEFAULT COLLATE utf8mb4_unicode_ci;
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USE week3_student;
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-- 创建学生表
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DROP TABLE IF EXISTS student;
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CREATE TABLE student (
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id BIGINT NOT NULL AUTO_INCREMENT COMMENT '主键ID',
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name VARCHAR(20) NOT NULL COMMENT '姓名',
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age INT NOT NULL COMMENT '年龄',
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email VARCHAR(50) NOT NULL COMMENT '邮箱',
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score INT NOT NULL DEFAULT 0 COMMENT '成绩 0-100',
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create_time DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
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update_time DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
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PRIMARY KEY (id),
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INDEX idx_name (name),
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INDEX idx_score (score)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='学生表';
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-- 预置测试数据
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INSERT INTO student (name, age, email, score) VALUES
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('张三', 20, 'zhangsan@mail.com', 85),
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('李四', 22, 'lisi@mail.com', 92),
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('王五', 19, 'wangwu@mail.com', 78),
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('赵六', 21, 'zhaoliu@mail.com', 88),
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('孙七', 23, 'sunqi@mail.com', 95),
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('周八', 20, 'zhouba@mail.com', 73),
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('吴九', 22, 'wujiu@mail.com', 81),
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('郑十', 21, 'zhengshi@mail.com',90),
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('钱十一', 19, 'qianshiyi@mail.com', 67),
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('陈十二', 23, 'chenshier@mail.com', 88);
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-- 验证数据
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SELECT COUNT(*) AS total_students FROM student;
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SELECT * FROM student ORDER BY id;
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