$sql="SELECT PLAYER.USERNAME,PLAYER.LEVEL,PLAYER.SCHOOL,LOCATIONS.NAME FROM PLAYER LEFT JOIN ISLAND_STATUS ON (ISLAND_STATUS.USERID=PLAYER.ID AND ISLAND_STATUS.STATUS='C') LEFT JOIN LOCATIONS ON (ISLAND_STATUS.LOCATION=LOCATIONS.ID) WHERE UNIX_TIMESTAMP(LASTACTION) > UNIX_TIMESTAMP(CURRENT_TIMESTAMP)-15*60 AND PLAYER.AUTHORIZED = 'Y' ORDER BY EXPERIENCE DESC";