Can't execute query

SELECT FROM store_tw p, profession_tw c, store_category_tw as it WHERE = AND = it.category AND p.available = '1' AND c.available = '1' AND p.postDate <= '2018-04-20' AND p.expireDate >= '2018-04-20'  AND it.category in () GROUP by

MySQL Error: 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 ') GROUP by' at line 1

This script cannot continue, terminating.