select * from data where sn='1' and pq='gputemp' order by id desc limit 4
idsntspqvaluesystemts
21718711 1 gputemp 47.8 1561534845 Wed 26 06 2019 09:40:45
21718699 1 gputemp 47.8 1561534824 Wed 26 06 2019 09:40:24
21718688 1 gputemp 47.8 1561534804 Wed 26 06 2019 09:40:04
21718674 1 gputemp 47.8 1561534784 Wed 26 06 2019 09:39:44

Wed Jun 26 09:40:57 2019 by walley