I have data files which consist of samples from a datalogger, which creates one record every half hour (or similar) with temperature readings. I need to aggregate the 48 half hourly records for one day into a single record for the day with 48 temperature values. Is there a way to get an Aggregate transformer to do this, please? Or any other way?
TIA
Bob irving
TIA
Bob irving
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Hi Bob,
I would recommend to use http://doc.cloveretl.com/documentation/ ... lizer.html
* add "measurement_day" field into input record
* sort input data by "measurement_day" field
* set "Key" property of Denormalizer to "measurement_day" field (this ensures only records of same day are processed together)
* prepare output data so it contains field "temperatures" of type List (http://doc.cloveretl.com/documentation/ ... ields.html)
* in Denormalizer transformation just fill data into list using CTL2 functions - see http://doc.cloveretl.com/documentation/ ... -ctl2.html
Other possibility is to use String for "temperatures" instead of List and store data as comma separated values.
I hope this helps.
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