WordPress database error: [Unknown column 'last_update' in 'WHERE']
DELETE FROM `wpiq_cleantalk_sessions` WHERE last_update < NOW() - INTERVAL 86400 SECOND LIMIT 100000;

WordPress database error: [Unknown column 'last_update' in 'WHERE']
SELECT COUNT(id) FROM `wpiq_cleantalk_sessions` WHERE last_update < NOW() - INTERVAL 86400 SECOND;