SELECT (SELECT COUNT(*) FROM CLOG{0} WHERE STCODE = "AT" AND EVTYPE = 1 AND SERIALNO={ME} AND LOGDATE>=DATEADD(HH,-4, "{DU}"))+(SELECT COUNT(*) FROM CLOG{1} WHERE STCODE = "AT" AND EVTYPE = 1 AND SERIALNO={ME} AND LOGDATE>=DATEADD(HH,-4, "{DU}"))