Ejemplo muchas claves foraneas

private void rentasBrowseActionPerformed(java.awt.event.ActionEvent evt) {                                             
        final String sql = "SELECT renta_id AS ID, "
                + "cliente_nombre AS Cliente, "
                + "vehiculo_id AS Vehiculo, "
                + "estado_renta_descripcion AS Estado, "
                + "renta_desde AS Desde, "
                + "renta_hasta AS Hasta, "
                + "renta_enviada_confirmacion AS Enviada, "
                + "renta_pagada AS Pagada FROM renta NATURAL JOIN vehiculo NATURAL join cliente NATURAL JOIN estado_renta";
        try {
            ResultSet rs = db.doQuery(sql);

            JDBCTableAdapter modelo = new JDBCTableAdapter(rs, 4);
            modelo.addTableModelListener(new VehiculosTableListener(db, "renta", "renta_id"));
            TableBrowser browser = new TableBrowser("Rentas", modelo);
            browser.setVisible(true);
            this.desktopPane.add(browser);

        } catch (SQLException ex) {
            ex.printStackTrace(System.err);
        }
    }