mysql怎么关闭数据库连接

mysql> quit

import pymysql

# 创建连接
conn = pymysql.connect(host='localhost', user='root', password='password', database='mydb')

# 执行操作

# 关闭连接
conn.close()

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class CloseConnectionExample {
    public static void main(String[] args) {
        Connection conn = null;

        try {
            // 创建连接
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb", "root", "password");

            // 执行操作

        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭连接
            if (conn != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

mysql> KILL [连接ID];

mysql> SHOW PROCESSLIST;