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 ') ORDER BY RAND() DESC, nome ASC LIMIT 0,7' at line 3

SELECT id, nome, ano FROM eventos WHERE id IN (SELECT DISTINCT(evento) FROM trabalhos WHERE evento <> ) ORDER BY RAND() DESC, nome ASC LIMIT 0,7