（95）课120：用命令行备份数据库 mysqldump【--single-transaction不加锁备份】-p3306端口号 -u账户名 -p密码 要备份的数据库名 ＞ D:\文件名.sql

（195）

（196） 用 vscode 这样的文本编辑器打开上面生成的 hahaha.sql 文件 ：

-- MySQL dump 10.13  Distrib 8.0.41, for Win64 (x86_64)
--
-- Host: localhost    Database: 0615
-- ------------------------------------------------------
-- Server version	8.0.41      本文件来自于 hahaha.sql 。验证数据备份

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!50503 SET NAMES utf8mb4 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

--
-- Table structure for table `books`
--

DROP TABLE IF EXISTS `books`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!50503 SET character_set_client = utf8mb4 */;
CREATE TABLE `books` (
  `book_id` int NOT NULL AUTO_INCREMENT,
  `book_name` varchar(50) NOT NULL,
  `book_author` varchar(20) NOT NULL,
  `book_price` decimal(10,2) NOT NULL,
  `book_stock` int NOT NULL,
  `book_desc` varchar(200) DEFAULT NULL,
  PRIMARY KEY (`book_id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
/*!40101 SET character_set_client = @saved_cs_client */;

--
-- Dumping data for table `books`
--

LOCK TABLES `books` WRITE;
/*!40000 ALTER TABLE `books` DISABLE KEYS */;
INSERT INTO `books` 
VALUES (1,'Java程序设计','乐乐',38.80,12,'乐乐带你学Java'),
       (2,'Java王者之路','周哥',44.40,7,'周哥，Java王者领路人');
/*!40000 ALTER TABLE `books` ENABLE KEYS */;
UNLOCK TABLES;

--
-- Table structure for table `records`
--

DROP TABLE IF EXISTS `records`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!50503 SET character_set_client = utf8mb4 */;
CREATE TABLE `records` (
  `rid` int NOT NULL AUTO_INCREMENT,
  `snum` char(4) NOT NULL,
  `bid` int NOT NULL,
  `borrow_num` int NOT NULL,
  `is_return` int NOT NULL,
  `borrow_date` date NOT NULL,
  PRIMARY KEY (`rid`),
  KEY `FK_RECORDS_STUDENTS` (`snum`),
  KEY `FK_RECORDS_BOOKS` (`bid`),
  CONSTRAINT `FK_RECORDS_BOOKS` FOREIGN KEY (`bid`) REFERENCES `books` (`book_id`),
  CONSTRAINT `FK_RECORDS_STUDENTS` FOREIGN KEY (`snum`) REFERENCES `students` (`stu_num`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
/*!40101 SET character_set_client = @saved_cs_client */;

--
-- Dumping data for table `records`
--

LOCK TABLES `records` WRITE;
/*!40000 ALTER TABLE `records` DISABLE KEYS */;
INSERT INTO `records` VALUES (3,'1001',2,2,0,'2025-06-15');
/*!40000 ALTER TABLE `records` ENABLE KEYS */;
UNLOCK TABLES;

--
-- Table structure for table `students`
--

DROP TABLE IF EXISTS `students`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!50503 SET character_set_client = utf8mb4 */;
CREATE TABLE `students` (
  `stu_num` char(4) NOT NULL,
  `stu_name` varchar(20) NOT NULL,
  `stu_gender` char(2) NOT NULL,
  `stu_age` int NOT NULL,
  PRIMARY KEY (`stu_num`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
/*!40101 SET character_set_client = @saved_cs_client */;

--
-- Dumping data for table `students`
--

LOCK TABLES `students` WRITE;
/*!40000 ALTER TABLE `students` DISABLE KEYS */;
INSERT INTO `students` 
VALUES ('1001','张三','男',20),('1002','李芳','女',20),('1003','王小明','男',20);
/*!40000 ALTER TABLE `students` ENABLE KEYS */;
UNLOCK TABLES;
/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

-- Dump completed on 2025-06-16 13:26:02

（）以及不加锁的备份 ：

（197）

谢谢