select * from data where sn='12250' order by id desc limit 4
idsntspqvaluesystemts
22759990 12250 temp 26.31 1563675902 Sun 21 07 2019 04:25:02
22759814 12250 temp 26.25 1563675602 Sun 21 07 2019 04:20:02
22759644 12250 temp 26.25 1563675302 Sun 21 07 2019 04:15:02
22759461 12250 temp 26.31 1563675002 Sun 21 07 2019 04:10:02

Sun Jul 21 04:26:05 2019 by walley