B.U.M.

1054 Unknown column 'p.products_id' in 'on clause'
in:
[select distinct p.products_id, p.products_image, p.products_tax_class_id, p.products_date_added, p.products_price, pd.products_id, pd.products_url from zen_products p, zen_products_description pd left join zen_specials s on p.products_id = s.products_id, zen_products_to_categories p2c, zen_categories c where p.products_id = p2c.products_id and p2c.categories_id = c.categories_id and pd.products_id = p.products_id and c.parent_id = '0' and p.products_status = 1 ]