Some help with a Mysql query please

[dailce]

I have the following which is partly used to select random products.

 

$new_products_query = tep_db_query("select distinct p.products_id, p.products_quantity, p.products_image, p.products_tax_class_id, s.status, s.specials_new_products_price, p.products_price from " . TABLE_PRODUCTS . " p left join " . TABLE_SPECIALS . " s on p.products_id = s.products_id, " . TABLE_PRODUCTS_TO_CATEGORIES . " p2c, " . TABLE_CATEGORIES . " c where p.products_id = p2c.products_id and p2c.categories_id = c.categories_id and c.parent_id = '" . (int)$new_products_category_id . "' and p.products_status = '1' order by p.products_date_added desc limit " . MAX_DISPLAY_NEW_PRODUCTS);

 

I would like to exclude products that have attributes from the above query. What do I need to do?