mysql jdbc多表查询

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

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

        try (Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement();
             ResultSet rs = stmt.executeQuery("SELECT u.username, p.product_name, o.order_date " +
                     "FROM users u " +
                     "INNER JOIN orders o ON u.user_id = o.user_id " +
                     "INNER JOIN products p ON o.product_id = p.product_id")) {

            while (rs.next()) {
                System.out.println("Username: " + rs.getString("username") +
                        ", Product Name: " + rs.getString("product_name") +
                        ", Order Date: " + rs.getDate("order_date"));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}