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I have a data-set which includes time {hh,mm,ss} and temperature.
I want to aggregate the temperature with respect to the time.
For each minute in a specific hour there are number of temperature records and I want to calculate the average of them to have a single value for each minute.
Thanks in advance.
Use date functions ( http://www.w3schools.com/sql/ ) to get more general (less precise) time [i.e. Hour and Minute only], group by that and use Average SQL function to get your average value.