一.导出一张表数据

把test_time表中的数据导出成txt 文件

mysql> show global variables like '%secure%';+--------------------------+-----------------------+

| Variable_name | Value |

+--------------------------+-----------------------+

| require_secure_transport | OFF |

| secure_auth | ON |

| secure_file_priv | /var/lib/mysql-files/ | 这个是导出目录

+--------------------------+-----------------------+

3 rows in set (0.01 sec)

进行导出操作：

mysql> select * from test_time into outfile '/var/lib/mysql-files/test_time.txt';

Query OK, 1 row affected (0.00 sec)

会在目录下生成数据文件：

[root@master mysql-files]# more test_time.txt

1       no      2019-03-26 11:29:04     2019-03-26 11:30:55

可以进行格式的调整：

SELECT * INTO OUTFILE '/var/lib/mysql-files/test_time.txt'FIELDS TERMINATED BY',' OPTIONALLY ENCLOSED BY '"'LINES TERMINATED BY'\n'FROM test_time;

此刻生成的数据文件：

[root@master mysql-files]# more test_time.txt

1,"no","2019-03-26 11:29:04","2019-03-26 11:30:55"

二 导出SQL文件的数据

[root@master mysql-files]# mysqldump -u root -p mydb test_time >test_time.txt

Enter password:

以上命令创建的文件内容如下：

-- MySQL dump 10.13 Distrib 5.7.25, forLinux (x86_64)--

--Host: localhost Database: mydb-- ------------------------------------------------------

-- Server version 5.7.25

/*!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*/;/*!40101 SET NAMES utf8*/;/*!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 fortable `test_time`--DROP TABLE IF EXISTS `test_time`;/*!40101 SET @saved_cs_client = @@character_set_client*/;/*!40101 SET character_set_client = utf8*/;

CREATE TABLE `test_time` (

`id`int(11) NOT NULL,

`status` varchar(24) DEFAULT NULL,

`create_time` datetime DEFAULT CURRENT_TIMESTAMP,

`update_time` datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=latin1 COMMENT='测试时间表';/*!40101 SET character_set_client = @saved_cs_client*/;--

-- Dumping data fortable `test_time`--LOCK TABLES `test_time` WRITE;/*!40000 ALTER TABLE `test_time` DISABLE KEYS*/;

INSERT INTO `test_time` VALUES (1,'no','2019-03-26 11:29:04','2019-03-26 11:30:55');/*!40000 ALTER TABLE `test_time` 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 2019-03-26 11:59:06

如果你需要导出整个数据库的数据，可以使用以下命令：

[root@master mysql-files]# mysqldump -u root -p mydb>mydb.txt

Enter password:

如果需要备份所有数据库，可以使用以下命令：

[root@master mysql-files]# mysqldump -u root -p --all-databases >database_dump.txt

Enter password: