Innodb 存储引擎 学习笔记 -备份
使用 mysqldump 备份数据库
例子：
把 index_study 数据库备份到 index_study.dump 文件中
C:\Users\DXT00>mysqldump -u root -p index_study > index_study.dump
Enter password: ********在相应的路径即可找到我们备份的dump文件：
index_stduy.dump
-- MySQL dump 10.13 Distrib 8.0.13, for Win64 (x86_64)
--
-- Host: localhost Database: index_study
-- ------------------------------------------------------
-- Server version 8.0.13
/*!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 */;
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 `fts_a`
--
DROP TABLE IF EXISTS `fts_a`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
SET character_set_client = utf8mb4 ;
CREATE TABLE `fts_a` (
`FTS_DOC_ID` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`body` text,
PRIMARY KEY (`FTS_DOC_ID`),
FULLTEXT KEY `body` (`body`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `fts_a`
--
LOCK TABLES `fts_a` WRITE;
/*!40000 ALTER TABLE `fts_a` DISABLE KEYS */;
INSERT INTO `fts_a` VALUES (1,'please porridge in the pot'),(3,'Nine days old'),(4,'Some like it hot,some like it cold'),(5,'please porridge hot,please porridge cold');
/*!40000 ALTER TABLE `fts_a` ENABLE KEYS */;
UNLOCK TABLES;
--
-- Table structure for table `t`
--
DROP TABLE IF EXISTS `t`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
SET character_set_client = utf8mb4 ;
CREATE TABLE `t` (
`a` int(11) NOT NULL,
PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `t`
--
LOCK TABLES `t` WRITE;
/*!40000 ALTER TABLE `t` DISABLE KEYS */;
INSERT INTO `t` VALUES (1),(2),(3),(4);
/*!40000 ALTER TABLE `t` ENABLE KEYS */;
UNLOCK TABLES;
--
-- Table structure for table `z`
--
DROP TABLE IF EXISTS `z`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
SET character_set_client = utf8mb4 ;
CREATE TABLE `z` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `z`
--
LOCK TABLES `z` WRITE;
/*!40000 ALTER TABLE `z` DISABLE KEYS */;
INSERT INTO `z` VALUES (1,1),(3,1),(5,3),(7,6),(8,6),(6,7),(10,8),(22,33),(100,100),(200,200);
/*!40000 ALTER TABLE `z` 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 2019-03-14 10:56:27
查询数据文件存储位置：
show global variables like "%datadir%";
mysql> show global variables like "%datadir%";
+---------------+---------------------------------------------+
| Variable_name | Value |
+---------------+---------------------------------------------+
| datadir | C:\ProgramData\MySQL\MySQL Server 8.0\Data\ |
+---------------+---------------------------------------------+
1 row in set, 1 warning (0.05 sec)查看dxt数据库：
my_myisam.frm：存储表的结构；my_myisam.MYD：存储表的数据；my_myisam.MYI：存储表的索引。- mysql 8.0以后会生成.sdi文件而不是.frm
而使用innodb引擎会生成 .idb文件
单表数据备份：