1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'order by' at line 7
in:
[select p.products_image, pd.products_name, p.products_quantity, p.products_id, p.products_type, p.master_categories_id, p.manufacturers_id, p.products_price, p.products_tax_class_id, pd.products_description, IF(s.status = 1, s.specials_new_products_price, NULL) as specials_new_products_price, IF(s.status =1, s.specials_new_products_price, p.products_price) as final_price, p.products_sort_order, p.product_is_call, p.product_is_always_free_shipping, p.products_qty_box_status from zs_products_description pd, zs_products p left join zs_manufacturers m on p.manufacturers_id = m.manufacturers_id, zs_products_to_categories p2c left join zs_specials s on p2c.products_id = s.products_id where p.products_status = 1 and p.products_id = p2c.products_id and pd.products_id = p2c.products_id and pd.language_id = '1' and p2c.categories_id = '52' order by pd.products_viewed DESC order by ]