influxql

问题 I have some measurement data in my influxdb database which I can query with: select * from E_real_con name: E_real_con time value ---- ----- 1537920001044785525 | 57160036.00 1538006401069651036 | 57227208.00 1538092800108297103 | 57294112.00 1538179200697333731 | 57366108.00 However, "value" is a cumulative value and I would like to get the delta/difference between two consecutive values. I tried the following: SELECT difference(last(value)) FROM E_real_con WHERE time >= now() - 7d GROUP BY

问题 I have some measurement data in my influxdb database which I can query with: select * from E_real_con name: E_real_con time value ---- ----- 1537920001044785525 | 57160036.00 1538006401069651036 | 57227208.00 1538092800108297103 | 57294112.00 1538179200697333731 | 57366108.00 However, "value" is a cumulative value and I would like to get the delta/difference between two consecutive values. I tried the following: SELECT difference(last(value)) FROM E_real_con WHERE time >= now() - 7d GROUP BY