select * from data where sn='NAVenku' order by id desc limit 4
idsntspqvaluesystemts
21720820 NAVenku temp 28.9 1561537923 Wed 26 06 2019 10:32:03
21720819 NAVenku hum 66 1561537923 Wed 26 06 2019 10:32:03
21720464 NAVenku hum 67 1561537308 Wed 26 06 2019 10:21:48
21720463 NAVenku temp 28.4 1561537308 Wed 26 06 2019 10:21:48

Wed Jun 26 10:45:44 2019 by walley