How to find the MySQL host name

How to find the MySQL host name, specific code examples are required

MySQL is a commonly used relational database management system, and many developers need to obtain the host when using MySQL name. In practical applications, you can find the MySQL host name with some simple code examples. This article explains how to find the MySQL host name and provides specific code examples.

1. Using the MySQL command line tool
   You can easily find the MySQL host name through the MySQL command line tool. First log in to the command line interface of the MySQL server and enter the following command:

SHOW VARIABLES LIKE 'hostname';

This SQL statement will return the host name of the MySQL server. If no hostname is set, the server's IP address is displayed by default. In this way, the MySQL host name can be found through the MySQL command line tool.

2. Use Python to connect to MySQL
   Python is a commonly used programming language. You can connect to the MySQL database through Python and obtain the host name. The following is a simple Python sample code:

import mysql.connector

mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  password="password",
  database="mydatabase"
)

mycursor = mydb.cursor()

mycursor.execute("SHOW VARIABLES LIKE 'hostname'")

result = mycursor.fetchone()

print("MySQL主机名称为：" + result[1])

Through this Python code, first establish a connection to the MySQL database, then execute a SQL statement to find the host name, and output the result.

3. Use Java to connect to MySQL
   Similarly, you can also find the MySQL host name by connecting to the MySQL database through Java. The following is a simple Java sample code:

import java.sql.*;

public class Main {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "root";
        String password = "password";

        try {
            Connection conn = DriverManager.getConnection(url, user, password);

            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("SHOW VARIABLES LIKE 'hostname'");

            rs.next();
            String hostname = rs.getString(2);

            System.out.println("MySQL主机名称为: " + hostname);

        } catch (SQLException e) {
            System.out.println(e.getMessage());
        }
    }
}

Through this Java code, a connection to the MySQL database is first established, and then an SQL statement is executed to find the host name and the result is output.

With the above methods and code examples, you can easily find the MySQL host name. Whether through the MySQL command line tool, Python or Java, the host name can be easily obtained, providing convenience to developers. I hope the above content can help readers in need.

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