MySQL Error - Illegal Query of SELECT ST.STAFF_ID, ST.IMAGE_PATH, ST.NAME_FIRST, ST.NAME_MIDDLE, ST.NAME_LAST, ST.SUFFIX, STA.CATEGORY, STA.VALUE FROM STAFF_ATTRIBUTES STA, STAFF ST WHERE ST.STAFF_ID = AND STA.STAFF_ID = ST.STAFF_ID GROUP BY STA.CATEGORY, STA.VALUE ORDER BY STA.CATEGORY, STA.VALUE.