mysql导出和导入表结构

-- 使用mysql的Mysqldump导出和导入表结构
-- 命令如下：

mysqldump -d -h localhost -u root -pmypassword databasename > dumpfile.sql

-- 其中-d 表示只导出表结构，不导出数据，-h 表示host，-u表示用户，-p表示密码 database表示导出那个数据库，dumpfile.sql 表示导出生成的sql语句

--有以下数据库

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sakila             |
| test               |
| world              |
+--------------------+
6 rows in set (0.00 sec)

mysql>

-- 例如，导出test数据库下的表，test数据库下有以下的表ld_csv1、t1

mysql> use test
Database changed
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| ld_csv1        |
| t1             |
+----------------+
2 rows in set (0.00 sec)

mysql>
mysql> desc t1;
+-------+------------+------+-----+---------+-------+
| Field | Type       | Null | Key | Default | Extra |
+-------+------------+------+-----+---------+-------+
| id    | varchar(2) | YES  |     | NULL    |       |
+-------+------------+------+-----+---------+-------+
1 row in set (0.00 sec)

mysql>

-- 例如，导出test数据库下的表，

mysqldump -d -h 127.0.0.1 -uroot -pmysql test > d:\dumpfile.sql

-- 生成的dumpfile.sql内容如下：

-- MySQL dump 10.13  Distrib 5.6.40, for Win64 (x86_64)
--
-- Host: 127.0.0.1    Database: test
-- ------------------------------------------------------
-- Server version	5.6.40-log

/*!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 for table `ld_csv1`
--

DROP TABLE IF EXISTS `ld_csv1`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `ld_csv1` (
  `id` int(11) NOT NULL DEFAULT '0',
  `username` varchar(5) NOT NULL,
  `city` varchar(6) NOT NULL,
  `email` varchar(50) NOT NULL
) ENGINE=CSV DEFAULT CHARSET=gbk;
/*!40101 SET character_set_client = @saved_cs_client */;

--
-- Table structure for table `t1`
--

DROP TABLE IF EXISTS `t1`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `t1` (
  `id` varchar(2) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
/*!40101 SET character_set_client = @saved_cs_client */;
/*!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 2018-09-20 11:04:07

-- 将导出的表结构文件dumpfile.sql复制到要导入的库所在的服务器，进行导入。将表结构导入到world数据库中，
-- world数据库，里面有t1表，t1表有一条记录

mysql> commit;
Query OK, 0 rows affected (0.00 sec)

mysql> select * from t1;
+------+------+
| id   | name |
+------+------+
| a    | b    |
+------+------+
1 row in set (0.00 sec)

mysql> select database();
+------------+
| database() |
+------------+
| world      |
+------------+
1 row in set (0.00 sec)

mysql>

-- 进行导入，在mysql上执行source d:\dumpfile.sql

mysql> source d:\dumpfile.sql
Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.16 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.03 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.06 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

mysql>

-- 导入后，world库里面有t1表和ld_csv1。并且t1表的表结构被替换（原来原来world库上的t1表有id和name字段，导入后只有id字段）

mysql> show tables;
+-----------------+
| Tables_in_world |
+-----------------+
| city            |
| country         |
| countrylanguage |
| ld_csv1         |
| t1              |
+-----------------+
5 rows in set (0.00 sec)

mysql> desc t1
    -> ;
+-------+------------+------+-----+---------+-------+
| Field | Type       | Null | Key | Default | Extra |
+-------+------------+------+-----+---------+-------+
| id    | varchar(2) | YES  |     | NULL    |       |
+-------+------------+------+-----+---------+-------+
1 row in set (0.00 sec)

mysql>

END

mysql导出和导入表结构

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