怎么连接到sql数据库服务器

import java.sql.*;

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

        try (Connection connection = DriverManager.getConnection(url, username, password)) {
            // 连接成功，进行数据库操作
            // ...
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

import pyodbc

server = 'localhost'
database = 'mydatabase'
username = 'sa'
password = 'mypassword'
driver = '{ODBC Driver 17 for SQL Server}'

connection_string = f"DRIVER={driver};SERVER={server};DATABASE={database};UID={username};PWD={password}"

try:
    with pyodbc.connect(connection_string) as connection:
        # 连接成功，进行数据库操作
        # ...
except pyodbc.Error as e:
    print("数据库连接错误:", e)