查看MySQL数据库版本的四种方法

mysql -u [username] -p

SHOW VARIABLES LIKE 'version';

SELECT version();

mysql -u root -p
Enter password:

mysql> SHOW VARIABLES LIKE 'version';
+---------------+-----------+
| Variable_name | Value     |
+---------------+-----------+
| version       | 8.0.23    |
+---------------+-----------+
1 row in set (0.01 sec)

mysql> SELECT version();
+-----------+
| version() |
+-----------+
| 8.0.23    |
+-----------+
1 row in set (0.00 sec)

mysqladmin -u [username] -p version

mysqladmin -u root -p version
Enter password:

mysqladmin  Ver 8.0.23 for Linux on x86_64 (MySQL Community Server - GPL)

Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Server version          8.0.23
Protocol version        10
Connection              Localhost via UNIX socket
UNIX socket             /var/run/mysqld/mysqld.sock
Uptime:                 1 hour 12 min 34 sec

Threads: 2  Questions: 3245  Slow queries: 0  Opens: 43  Flush tables: 2  Open tables: 36  Queries per second avg: 0.745

import mysql.connector

conn = mysql.connector.connect(
    host="localhost",
    user="root",
    password="your_password"
)

cursor = conn.cursor()
cursor.execute("SELECT version()")
version = cursor.fetchone()

print("MySQL version:", version[0])

cursor.close()
conn.close()

<?php
$servername = "localhost";
$username = "root";
$password = "your_password";

// 创建连接
$conn = new mysqli($servername, $username, $password);

// 检查连接
if ($conn->connect_error) {
  die("连接失败: " . $conn->connect_error);
}

// 查询 MySQL 版本
$result = $conn->query("SELECT version()");
$row = $result->fetch_assoc();

echo "MySQL version: " . $row["version()"];

$conn->close();
?>