error in sql query

	SELECT 	
	pc.pid
	FROM products p , products_categories pc
	WHERE 
		p.pid = pc.pid and 
		pc.cid=63 and
		p.is_visible='Yes' AND pc.pid IN()

.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 ')' at line 7