An Error Was Encountered

Error Number: 1064

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 'partition = 'video_external' GROUP BY card_id ORDER BY count desc LIMIT 100' at line 3

SELECT card_id, count(*) as count FROM comments WHERE partition = 'video_external' GROUP BY card_id ORDER BY count desc LIMIT 100