mysql command line installation

MySQL is one of the most popular and widely used relational database systems currently. There are two ways to install MySQL: using GUI tools and using the command line. This article explains how to install MySQL using the command line.

1. Download the MySQL installation package

First, you need to download the corresponding installation package from the MySQL official website. You can visit the following URL:

https://dev.mysql.com/downloads/mysql/

In the download page, select the applicable version of MySQL, for example, select MySQL 8.0 version. Download the complete package and save it to your local disk for later operations.

2. Install MySQL

To install MySQL, you can use the following command:

sudo apt-get install mysql-client mysql-server

This command will automatically install the MySQL client and server. For Linux operating systems, you can install it using its own package manager.

3. Configuring MySQL

After the installation is complete, you need to configure the MySQL database so that it can work correctly. Use the following command:

sudo mysql_secure_installation

Then follow the prompts to set the password and other settings for the MySQL root user. This process can set some security settings, such as preventing unauthorized remote logins.

4. Connect to MySQL

To connect to the MySQL database through the command line, you can use the following command:

mysql -u root -p

Among them, -u is used to specify the user of the database name, select the root user here; -p is used to specify the password to be entered, here is the password of the MySQL root user just set.

5. Create database

After connecting to the MySQL database, you can create a new database. Use the following command:

create database <database_name>;

Where, 6b7267f525327f2a23dcb01791a146aa is the name of the new database. In addition, you can also specify some properties for the new database, such as character set, etc.

6. Create table

After creating the database, you can create the table structure in it. You can use the following command:

create table <table_name> (
    <column1_name> <datatype>,
    <column2_name> <datatype>,
    ...
);

Where, 2d8f501bba7dbcabf64f6c8aceccc3b7 is the name of the table to be created, f4c55dd52f1b37a9debd48ac1ff8dbb5 is the column name, 2b59f2c90ebb859525db106a2e9e59ee is the data type. For example, you can create a table containing two columns: id and name:

create table users (
    id int primary key,
    name varchar(255)
);

7. Insert data

After the table structure is created, you can insert data into the table . You can use the following command:

insert into <table_name> (<column1_name>, <column2_name>, ...) values (<value1>, <value2>, ...);

For example, you can add a new user:

insert into users (id, name) values (1, 'Tom');

8. Query data

After adding data, you can query the table data in. You can use the following command:

select <column1_name>, <column2_name>, ... from <table_name>;

For example, you can query all data in the users table:

select * from users;

9. Update data

You can use the following command to update the table Data in:

update <table_name> set <column_name> = <new_value> where <some_condition>;

For example, to change the name of user Tom to Jerry, you can execute the following command:

update users set name = 'Jerry' where id = 1;

10. Delete data

Finally , you can use the following command to delete the data in the table:

delete from <table_name> where <some_condition>;

For example, to delete the user Tom, you can execute the following command:

delete from users where id = 1;

Summary

MySQL is a powerful A relational database system that can be installed, configured, and managed through the command line. During this process, various commands can be used such as create database, create table structure, insert data, query data, update data and delete data. Using these commands, you can easily manage the MySQL database system. By using the command line, you can complete the operation more conveniently and quickly.

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