select * from data where sn='max0' and pq='curr' order by id desc limit 4
idsntspqvaluesystemts
4696059 max0 curr 3.387 1501373182 Sun 30 07 2017 02:06:22
4696043 max0 curr 0.997 1501373122 Sun 30 07 2017 02:05:22
4696019 max0 curr 1.312 1501373061 Sun 30 07 2017 02:04:21
4696000 max0 curr 1.120 1501373000 Sun 30 07 2017 02:03:20

Tue May 21 21:15:52 2019 by walley