MySQL returned error

Error Description :

Error No : 1064
Description : 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 'and slug='a-glimpse-of-our-recent-exhibition-in-bengaluru-on-july-7-9-at-sout...' at line 1

SQL Query
SELECT `category`.* FROM `category` WHERE id!=0 AND status='Active' and parentcategory_id= and slug='a-glimpse-of-our-recent-exhibition-in-bengaluru-on-july-7-9-at-south-india-s-biggest-exhibition-on-tent-decor-and-catering'