What are the basic usage methods of MySQL

MySQL What are the basic usage methods of

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MySQL It's the most popular Relational database Management system , stay WEB Application aspect MySQL It's the best RDBMS(Relational Database Management System： Relational database management system ) One of the application software .

MySQL Installation

download MySQL Installation file

install MySQL The following two files are required , You can download it on the official website .

MySQL install

The server The installation commands for client and client are as follows ：

[[email protected] local]# rpm -ivh MySQL-server-5.2.0-0.glibc23.i386.rpm[[email protected] local]# rpm -ivh MySQL-client-5.2.0-0.glibc23.i386.rpm

Whether the server-side test is successfully installed , Can run netstat see MySQL Is the port open , The default port is 3306, The order is as follows ：

[[email protected] local]# netstat -nat

MySQL Start and stop of

start-up

MySQL After the installation, start the file mysql stay /etc/init.d Under the table of contents , When you need to start , Run the following command ：

[[email protected] init.d]# /etc/init.d/mysql start

Stop and restart

Be careful ： Different versions may cause different commands , Only the commands of this version are listed here , Please ask Du Niang for other versions .

[[email protected] local]# service mysqld stop[[email protected] local]# service mysqld restart

MySQL To configure

Several important directories

MySQL Not after installation SQL server It is installed in a directory by default , Its database files 、 Configuration files and command files are in different directories , Here are a few directories ： 1. Database directory

/etc/lib/mysql/

2. The configuration file

/usr/share/mysql(mysql.server Commands and configuration files )

3. Relevant command

/usr/bin(mysqladmin、mysqldump Wait for the order )

4. The startup script

/etc/rc.d/init.d/

Change login password

MySQL No password by default , The importance of adding passwords after installation is self-evident . 1. command

usr/bin/mysqladmin -u root password \'new-password'\

Format ：mysqladmin -u user name -p Old password password New password 2. Example （ to root encryption key 123456）：

[[email protected] local]# usr/bin/mysqladmin -u root password 123456

Be careful ： Because at the beginning root No password , therefore -p Old passwords can be omitted .

Database backup and recovery

1. Backup database

mysqldump –user=root –password=root password  –lock-all-tables  Database name  >  Backup file .sql

2. Recover database

mysql -u root –password=root password   Database name 

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