sql insert into smeter1 values ('2021-08-08 10:10:12', 10, 2);
sql insert into smeter1 values ('2021-08-08 10:10:14', 20, 1);
sql select stddev(voltage) from smeters where ts>='2021-08-08 10:10:10.000' and ts < '2021-08-08 10:10:20.000' and current=10 interval(1000a);
sql select _wstart, stddev(voltage) from smeters where ts>='2021-08-08 10:10:10.000' and ts < '2021-08-08 10:10:20.000' and current=10 interval(1000a);
if $rows != 2 then
return -1
endi
...
...
@@ -1019,3 +992,4 @@ if $data00 != 0.000000000 then