Monday, November 24, 2014

Setup and run MySQL on Ubuntu 14.04 LTS

Suppose you want to install and run MySQL on Ubuntu, run the following commands to install the MySQL in the terminal:

> sudo apt-get install mysql-server
> sudo apt-get install mysql-client

During the installation of the mysql-server, the user will prompted to enter the password for the root user account. After the installation is completed, the user can run the following command to find out whether mysql-server is running on the computer:

> sudo netstat -tap | grep mysql

To start, stop or restart mysql, run one of the following commands:

> sudo /etc/init.d/mysql start
> sudo /etc/init.d/mysql stop
> sudo /etc/init.d/mysql restart

To log into mysql, run the following command

> sudo mysql -u [username] -p

Enter the password in the prompt and press ENTER. For example, to log into the root user account:

> mysql -u root -p

After logging into mysql, first select the database by running the following sql command (which select the database "mysql" which is the default):

> use mysql;

To list the tables in the "mysql" database, run the following sql command:

> show tables;

Now suppose we want to take a look at what is inside the "user" datatable. Run the following sql command:

> select * from user;

To create and select a new database, e.g., "mylog", run the following sql command:

> create database mylog;
> use mylog;

To create a datatable, e.g., "mylogtable", in the database "mylog", run the following sql commands:

> use mylog;
> create table mylogtable(
country VARCHAR(255) NULL);

To exit mysql, run the following sql command:

> quit;

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