Maximo valor de campo en varias tablas

[the_web_saint]

Hola gnzsoloyo, esta sentencia podria servirme?

SELECT MAX(num_order) FROM tbl_text INNER JOIN tbl_textbox USING(num_orde
r, id_columna) INNER JOIN tbl_menu USING (num_order, id_columna) INNER JOIN tbl_
checkbox USING (num_order, id_columna) INNER JOIN tbl_radio USING (num_order, i
d_columna) INNER JOIN tbl_file USING (num_order, id_columna) WHERE id_columna=3'
3';

Gracias...