select * from data where sn='12250' order by id desc limit 4
idsntspqvaluesystemts
39737950 12250 temp 25.62 1594696802 Tue 14 07 2020 05:20:02
39737751 12250 temp 25.56 1594696502 Tue 14 07 2020 05:15:02
39737545 12250 temp 25.75 1594696202 Tue 14 07 2020 05:10:02
39737346 12250 temp 25.06 1594695902 Tue 14 07 2020 05:05:02

Tue Jul 14 05:31:56 2020 by walley