MySql利用mysql&mysqldum导入导出数据
测试环境
Linux下测试,数据库MySql
工具
mysqldump,该命令位于mysql/bin/目录中:..../mysql/bin/mysqldump
步骤
1.cd命令进入到mysqldump所在目录下。
首先得知道mysql命令或mysqldump命令的完整路径,可以使用find命令查找
如:查找mysqldump命令的完整路径,这里/usr/local/mysql是MySql数据库的安装路径
find / -name mysql -print
cd /usr/local/mysql/bin
2.导出指定数据库中的所有数据,把导出数据命名为hdlogsys.sql,存放与/usr目录下
/usr/local/mysql/bin# mysqldump -u root -p hdlogsys > /usr/hdlogsys.sql
-bash: mysqldump: command not found
解决办法:
1)首先考虑系统环境变量。
2)在环境变量ok的情况下,进行如下操作。
把mysqldump的路径如:/usr/local/mysql/bin/mysqldump,映射一个链接到/usr/bin目录下,相当于建立一个链接文件,如下
/usr/local/mysql/bin# ln -s /usr/local/mysql/bin/mysqldumpusr/bin/mysqldump
注意:每次退出后再次使用就又要重新运行该命令
说明:
有时候安装好MySQL程序的时候,直接输入命令mysql或mysqldump会发现提示命令不存在,这是由于系统默认会查找/usr/bin下的命令,如果这个命令不在这个目录下,当然会找不到命令
建立映射链接后,进入映射目录如:/usr/bin或者命令所在实际目录如:/usr/local/mysql/bin/mysqldump
键入上述的mysqldump命令,可以导出数据
4.cd命令进入到mysqldump所在目录下。
cd /usr/local/mysql/bin
5.把导出的数据导入到指定数据库
【对于mysql命令,如果遇到上述问题,采与上述相同的解决方式。】
builder:/usr/local/mysql/bin# mysql -u root -p
Enter password:
(输入数据库访问密码)
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 39617
Server version: 5.5.23-MariaDB-log Source distribution
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL v2 license
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>use heidunlog
(这里输use要导入数据的数据库名)
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
MariaDB [heidunlog]>source /usr/heidunlog.sql
到这里如果要切换数据库名,则继续输入use语句
或者如下,直接指定数据库名
builder:/usr/local/mysql/bin# mysql -u root -p hdlogsys
Enter password:
(输入数据库访问密码)
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 2104
Server version: 5.5.27-MariaDB-log Source distribution
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL v2 license
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [hdlogsys]>source /usr/heidunlog.sql