Kiểm tra phiên bản mysql ubuntu

In this quick tutorial, we'll learn how to check the MySQL version of a server. Without a doubt, MySQL is one of the most popular RDBMS (Relational database management system)  options available, so you'll find it pretty much everywhere. There can be some pretty staggering differences between MySQL versions, so knowing which version you're working with is important. Learn here how to check the version of MySQL your server is using!

Let's start with a quick video review of this subject:

Check the MySQL version

• These instructions are intended for checking the MySQL (or MariaDB) version on our VPS server (and are similar to the dedicated server directions as well).
• We'll be working from our high-availability MySQL server, and I'll be logged in as root.

From the Command Line

1. With a command line open, enter the following command:
   subject

mysql -V
mysql Ver 15.1 Distrib 10.1.29-MariaDB, for Linux (x86_64) using readline 5.1

Note:

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From the MySQL Client

1. When you run the MySQL command client without any flags the version will be displayed. So while logged in via SSH enter:

mysql

Welcome to the MariaDB monitor.  Commands end with ; or \g. Your MariaDB connection id is 4 Server version: 10.1.29-MariaDB MariaDB Server

Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. 

Type '\c' to clear the current input statement.

The server version in this example is 10.1.29-MariaDB MariaDB Server.

2. From within the MySQL client, you can also run the following command for more details:

SHOW VARIABLES LIKE "%version%"; 

+-------------------------+----------------------------+
| Variable_name           | Value                      |
+-------------------------+----------------------------+
| innodb_version          | 5.6.36-82.2                |
| protocol_version        | 10                         |
| slave_type_conversions  |                            |
| version                 | 10.1.29-MariaDB            |
| version_comment         | MariaDB Server             |
| version_compile_machine | x86_64                     |
| version_compile_os      | Linux                      |
| version_malloc_library  | system                     |
| version_ssl_library     | OpenSSL 1.1.0g  2 Nov 2017 |
| wsrep_patch_version     | wsrep_25.21                |
+-------------------------+----------------------------+
10 rows in set (0.02 sec) 

In this block of text, you'll find additional version details about your installed MySQL software like innodb_version, protocol_version, version_ssl_library, and more.

From The PHPMyAdmin Interface

If you aren't familiar with running commands through ssh, you may have access to PHPMyAdmin on the server which gives a nice graphical interface for managing the databases. If you have cPanel or Plesk access you should be able to open PHPMyAdmin when logged in to the hosting account. In PHPMyAdmin on the right side, it should have information listen under the "Database server" section and the "Server version" is what shows the MySQL or MariaDB version is running on the server.

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Introduction

It is essential to know which version of MySQL you have installed.

Knowing the version number helps to determine if a specific feature is available or compatible with your system. This article provides five options to check your version of MySQL on Linux operating systems.

Prerequisites

• Access to the command line/terminal window
• Some operations require sudo or root privileges
• MySQL or MySQL fork installed (forks: MariaDB, Percona Server )

Check MySQL Version with V Command

The easiest way to find the MySQL version is with the command:

mysql -V

The command mysql –V is not OS specific. This command works on Windows, OS X, and Linux distributions including Ubuntu.

The MySQL client version in the example above is 10.4.5-MariaDB.

Note: The command provides the version of the MySQL client utility. The version could be the same as the MySQL server utility if installed on the same system as the server. However, if the client and server utilities are installed on different systems, they might not be the same.

How to Find Version Number with mysql Command

The MySQL command-line client is a simple SQL shell with input editing capabilities. You need to have administrative privileges or use the sudo command to gain access.

To access your MySQL client, use the command:

mysql

MySQL version data is available automatically once the MySQL client loads.

The MySQL client shell offers a lot more options to retrieve detailed information about the version installed.

SHOW VARIABLES LIKE Statement

Now that you have accessed the MySQL client shell, statements can provide detailed information about your MySQL installation. Keep in mind that all text commands within the MySQL client must end with a semicolon “;”

Enter the following command:

SHOW VARIABLES LIKE ‘%version%’;

The variable that contains MySQL version information is version.

SELECT VERSION Statement

It’s possible to obtain the version from within the MYSQL client by typing the SELECT VERSION() statement:

SELECT VERSION();

This command derives the data from the version variable disregarding other variables.

STATUS Command

The STATUScommand displays the version as well as version comment information:

STATUS;

The output includes uptime (how long the MySQL server has been running), threads (the number of active threads), and other useful information.

This statement provides the most comprehensive overview regarding the status of the MySQL installation and its current version.

Conclusion

You now know how to use the command line to check your MySQL version. Additionally, if you need to get a more detailed account of your MySQL version, this article explained how to display additional data from within the MySQL client.