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MYSQL导入导出sql文件简析_MySQL

May 27, 2016 pm 01:44 PM
mysqlsql fileImport and Export

一.MYSQL的命令行模式的设置

桌面->我的电脑->属性->环境变量->新建->
PATH=“;path\mysql\bin;”其中path为MYSQL的安装路径。

二、命令行进入MYSQL的方法

1.C:\>mysql -h hostname -u username -p
按ENTER键,等待然后输入密码。这里hostname为服务器的名称,如localhost,username为MYSQL的用户名,如root。
进入命令行后可以直接操作MYSQL了。
2.简单介绍一下MYSQL命令:


  mysql->CREATE DATABASE dbname;//创建数据库
  mysql->CREATE TABLE tablename;//创建表
  mysql->SHOW DATABASES;//显示数据库信息,有那些可用的数据库。
 mysql->USE dbname;//选择数据库
  mysql->SHOW TABLES;//显示表信息,有那些可用的表
  mysql->DESCRIBE tablename;//显示创建的表的信息


三、数据库导出数据库文件

1.将数据库mydb导出到e:\mysql\mydb.sql文件中:
打开开始->运行->输入cmd    进入命令行模式

c:\>mysqldump -h localhost -u root -p mydb >e:\mysql\mydb.sql

2.将数据库mydb中的mytable导出到e:\mysql\mytable.sql文件中:

c:\>mysqldump -h localhost -u root -p mydb mytable>e:\mysql\mytable.sql

3.将数据库mydb的结构导出到e:\mysql\mydb_stru.sql文件中:

c:\>mysqldump -h localhost -u root -p mydb --add-drop-table >e:\mysql\mydb_stru.sql

四、从外部文件导入数据到数据库

从e:\mysql\mydb2.sql中将文件中的SQL语句导入数据库中:
1.从命令行进入mysql,然后用命令CREATE DATABASE mydb2;创建数据库mydb2。
2.退出mysql 可以输入命令exit;或者quit;
3.在CMD中输入下列命令:

代码如下:

c:\>mysql -h localhost -u root -p mydb2 < e:\mysql\mydb2.sql

然后输入密码,就OK了。

五、导入文件大小限制问题的解决

默认情况下:mysql 对导入文件大小有限制的,最大为2M,所以当文件很大时候,直接无法导入,下面就这个问题的解决列举如下:
1.在php.ini中修改相关参数:
影响mysql导入文件大小的参数有三个:

    memory_limit=128M,upload_max_filesize=2M,post_max_size=8M

修改upload_max_filesize=200 M  这里修改满足你需要的大小,
可以同时修改其他两项memory_limit=250M  post_max_size=200M
这样就可以导入200M以下的.sql文件了。

以上就是关于MYSQL导入导出.sql文件的详细内容,更多相关内容请关注PHP中文网(www.php.cn)!


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