select * from data where sn='ds0' order by id desc limit 4
idsntspqvaluesystemts
27200989 ds0 hum 57.50 1571623462 Mon 21 10 2019 04:04:22
27200988 ds0 temp 20.50 1571623460 Mon 21 10 2019 04:04:20
27200983 ds0 hum 57.60 1571623438 Mon 21 10 2019 04:03:58
27200982 ds0 temp 20.50 1571623436 Mon 21 10 2019 04:03:56

Mon Oct 21 04:04:50 2019 by walley