ERROR WITH DATABASE QUERY!

Query:
SELECT media.media_id AS media_id, media.expanded as expanded, media.thumb_image as thumb_image, media.material_type AS material_type, media.file_type AS file_type, media.descr AS descr, media_links.link_id, media.media_file AS media_file FROM media_links, media WHERE media_links.link_type = "P" AND media.media_id = media_links.media_id AND media.active = "Y" AND media_links.linked_item_id =

MySQL Error:
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 '' at line 1