Mysql database of easyclick

EasyClick And MySQL database

MySQL Database introduction

MySQL Is a relational database management system , stay WEB Application aspect ,MySQL It's the best RDBMS (Relational Database Management System, Relational database management system ) Application software , It was made by Sweden MySQL AB Companies to develop , At present belongs to the Oracle Its products ,MySQL Is one of the most popular relational database management systems .

MySQL Characteristics :

• MySQL It's open source. , So you don't have to pay extra .
• MySQL Support large databases . Can handle large databases with tens of millions of records .
• MySQL standards-of-use SQL Data language form .
• MySQL It can be installed on different operating systems , And provide the operation interface of multiple programming languages . These programming languages include C、C++、Python、Java、Ruby wait .

MySQL Database installation

• MySQL Installation of database server software
• MySQL Installation of database client software

MySQL Installation of database server software :

With Ubuntu Operating system as an example , Open the terminal , Enter the following command

sudo apt-get install mysql-server

Show MySQL Effect drawing of server installation package information :

see MySQL Service renderings :

ps explain

• ps View the processes in the current system
• -a Represents all users
• -u Indicates that the user name is displayed
• -x Indicates that all executing programs are displayed

see MySQL Service status :

sudo service mysql status

stop it MySQL service :

sudo service mysql stop

start-up MySQL service :

sudo service mysql start

restart MySQL service :

sudo service mysql restart

MySQL Profile Introduction :
The configuration file path is : /etc/mysql/mysql.conf.d/mysqld.cnf
see MySQL Effect drawing of configuration file :

Description of main configuration information :

port Represents the port number , The default is 3306

bind-address Indicates that the server is bound to ip, The default is 127.0.0.1

datadir Indicates the database save path , The default is /var/lib/mysql

log_error Indicates the error log , The default is /var/log/mysql/error.log

MySQL Installation of database client software :

The client is a programmer or dba The software used , adopt socket To communicate with the server program .

frequently-used MySQL The database client software has

1. Graphical interface client Navicat, There are other open source free Baidu search .
2. Command line client mysql

The graphical interface version client searches by itself , The following describes the command line terminal installation MySQL client
stay Ubuntu Open the terminal , Enter the following command :

sudo apt-get install mysql-client

mysql Help for command use :

mysql --help

MySQL Client side usage :

MySQL Client connection MySQL Server command

mysql -uroot -p

-u: Express MySQL The user name of the server
-p: Express MySQL Server password
quit perhaps exit perhaps ctr + d Exit

summary

• MySQL Is a relational database management system
• install MySQL Server software use : sudo apt-get install mysql-server
• install MySQL Client software use : sudo apt-get install mysql-client
• Graphical MySQL Client software use Navicat

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