I made a mistake, on my last influxdb setup. Instead of writing just changing values to my db, i forced the system to write data each second (wrong cron expression used). This messed up the db a lot, also because the most datapoints are always the same. Unfortunately, i collected data like this since a full year now, but i would like to have the data of this anyway.
Example of my messed up data
time value
---- -----
1581118753696000000 3.9
1581119113761000000 3.8
1581119473832000000 3.7
1581119942525000000 3.7
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The cleaned version i would like to have should be
time value
---- -----
1581118753696000000 3.9
1581119113761000000 3.8
1581119473832000000 3.7
1581120002534000000 3.6
1581120782667000000 3.5
1581121082743000000 3.4
1581121562864000000 3.3
1581122191957000000 3.2
1581122524046000000 3.1
1581122883973000000 3
1581123003269000000 2.9
So basically its a “select the first altering” … i tried already the distinct function but it returns unusable timestamps (not usable for into clause since its always the same)
Any idea how to solve this? Any smart select/group/aggregation expression for this?
Another difficulty: The db is very large, for one measurement i already got 25521585 entries … a select * without limits will result in timeout … so doing it time slot wise is a good idea i think
Best regards
