尝试使用group by和rollup编写sql语句/java代码

SELECT column1, column2, SUM(column3) as total
FROM table
GROUP BY column1, column2 WITH ROLLUP;

import java.sql.*;

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

        try {
            Connection connection = DriverManager.getConnection(url, username, password);
            Statement statement = connection.createStatement();

            String sql = "SELECT column1, column2, SUM(column3) as total FROM table GROUP BY column1, column2 WITH ROLLUP";
            ResultSet resultSet = statement.executeQuery(sql);

            while (resultSet.next()) {
                String column1 = resultSet.getString("column1");
                String column2 = resultSet.getString("column2");
                int total = resultSet.getInt("total");

                System.out.println("Column1: " + column1 + ", Column2: " + column2 + ", Total: " + total);
            }

            resultSet.close();
            statement.close();
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}