MySQL 提供了几种用于查看服务器版本的方法,本文给大家做个简单的介绍。
每次通过 mysql 客户端连接服务器之后,都会显示一个欢迎信息,里面包含了服务器的版本:
mysql -uroot Enter password: ****** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 21 Server version: 8.0.32 MySQL Community Server - GPL Copyright (c) 2000, 2022, Oracle and/or its affiliates. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL 全局变量 @@version 存储了服务器的版本号,我们可以利用一个简单的 SELECT 语句查询其中的信息。例如:
SELECT @@version;
查询结果示例如下:
+-----------+ | @@version | +-----------+ | 8.0.32 | +-----------+
系统函数 VERSION() 也可以返回 MySQL 服务器的版本信息,例如:
SELECT VERSION(); +-----------+ | VERSION() | +-----------+ | 8.0.32 | +-----------+
SHOW VARIABLES 语句可以返回 MySQL 系统变量。通过添加 WHERE 条件,我们可以获取服务器的版本信息:
SHOW VARIABLES WHERE variable_name LIKE 'version%'; +--------------------------+-----------------------------+ | Variable_name | Value | +--------------------------+-----------------------------+ | version | 8.0.32 | | version_comment | MySQL Community Server - GPL| | version_compile_machine | x86_64 | | version_compile_os | Win64 | | version_compile_zlib | 1.2.11 | +--------------------------+-----------------+
连接到 MySQL 服务器之后,输入 STATUS 命令可以返回版本和其他信息:
STATUS;
返回结果示例如下:
-------------- C:\Program Files\MySQL\MySQL Server 8.0\bin\mysql.exe Ver 8.0.32 for Win64 on x86_64 (MySQL Community Server - GPL) Connection id: 21 Current database: Current user: root@localhost SSL: Cipher in use is TLS_AES_256_GCM_SHA384 Using delimiter: ; Server version: 8.0.32 MySQL Community Server - GPL Protocol version: 10 Connection: localhost via TCP/IP Server characterset: utf8mb4 Db characterset: utf8mb4 Client characterset: gbk Conn. characterset: gbk TCP port: 3306 Binary data as: Hexadecimal Uptime: 12 days 10 hours 10 min 48 sec Threads: 2 Questions: 443 Slow queries: 0 Opens: 350 Flush tables: 3 Open tables: 251 Queries per second avg: 0.000 --------------