sqlString = "select  v.voice_file_id,time_to_sec(v.duration) as duration,   " +
                "v.audio_channel,v.create_time,  s.confidence_score,s.phrase_id,  " +
                "time_to_sec(s.start_time) as start_time,  time_to_sec(s.end_time) as end_time " +
                "from   (select confidence_score, phrase_id, start_time, end_time, voice_file_id " +
                "from search_job_result limit "+(j * 100000)+",100000"+") s, voice_file v where s.voice_file_id = v.voice_file_id";