Select
		roundtime,uljl_jam,ps1_jam
			
	FROM
        
		(Select
		
		  SUM(jam_area.jam_ulgl = 1) AS uljl_jam,
		  SUM(jam_area.jam_ps1 = 1) AS ps1_jam,
		  FROM_UNIXTIME(CEIL(UNIX_TIMESTAMP(jam_area.t_stamp) / 60) * 60) roundtime
        
		FROM jam_area
		Where (jam_area.t_stamp BETWEEN :starttime AND :endtime) and ('Induct 1' = :Induct)
	
		Group BY FROM_UNIXTIME(CEIL(UNIX_TIMESTAMP(jam_area.t_stamp) / 1800) * 1800)
		Order By jam_area.t_stamp ASC
		) okeyjam