1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') order by find_in_set(p.products_id,'') limit 20' at line 1
in:
[select p.products_id,p.products_image,products_price_sorter,pd.products_name from products p, products_description pd where p.`products_id`=pd.`products_id` AND pd.`language_id` = '1' AND p.products_id in () order by find_in_set(p.products_id,'') limit 20]