select * from data where sn='1' order by id desc limit 4
idsntspqvaluesystemts
29378611 1 cputemp 37.552 1576443807 Sun 15 12 2019 22:03:27
29378610 1 gputemp 37.6 1576443807 Sun 15 12 2019 22:03:27
29378609 1 ip 192.168.2.148 1576443807 Sun 15 12 2019 22:03:27
29378599 1 ip 192.168.2.148 1576443804 Sun 15 12 2019 22:03:24

Sun Dec 15 22:03:45 2019 by walley