select * from data where sn='1' order by id desc limit 4
idsntspqvaluesystemts
20702629 1 ip 192.168.2.148 1558463315 Tue 21 05 2019 20:28:35
20702628 1 gputemp 40.8 1558463315 Tue 21 05 2019 20:28:35
20702627 1 cputemp 40.78 1558463315 Tue 21 05 2019 20:28:35
20702618 1 ip 192.168.2.148 1558463295 Tue 21 05 2019 20:28:15

Tue May 21 20:28:51 2019 by walley