Can't execute query

SELECT *
                             FROM product_pages
                             WHERE product_group_id = 
                             AND product_group_id <> -1
                             AND id <> 2087
                             AND hide <> 1
	                           

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 'AND product_group_id <> -1 AND id <> 2087 ' at line 4

This script cannot continue, terminating.