select * from data where sn='ds0' and pq='hum' order by id desc limit 4
idsntspqvaluesystemts
22759666 ds0 hum 69.90 1563675301 Sun 21 07 2019 04:15:01
22759655 ds0 hum 69.90 1563675279 Sun 21 07 2019 04:14:39
22759642 ds0 hum 69.90 1563675257 Sun 21 07 2019 04:14:17
22759628 ds0 hum 69.90 1563675236 Sun 21 07 2019 04:13:56

Sun Jul 21 04:15:24 2019 by walley