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POAverage aggregation on temporal DB based on measurment with 10-minute intervals in PostgreSQL
 

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  1. POAverage aggregation on temporal DB based on measurment with 10-minute intervals in PostgreSQL
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    <p>I have a temporal database and I want to perform the temporal aggregation via average function on time series data by using data in time sequence of following:</p> <pre><code>Hourly average of HH= (HH-1):51, HH:01, HH:11, HH:21, HH:31, HH:41. </code></pre> <p>Moreover, aforementioned values are instantaneous values. </p> <p>Sample data:</p> <pre><code> ambtemp ddate_ttime 1 -1.42 2007-09-28 23:39:09 2 -1.24 2007-09-28 23:41:09 3 -1.28 2007-09-28 23:43:09 4 -1.28 2007-09-28 23:45:09 5 -1.24 2007-09-28 23:47:09 6 -1.42 2007-09-28 23:49:09 7 -1.68 2007-09-28 23:51:09 8 -1.76 2007-09-28 23:53:09 9 -1.96 2007-09-28 23:55:09 10 -2.02 2007-09-28 23:57:09 11 -1.92 2007-09-28 23:59:09 12 -1.64 2007-09-29 00:01:09 13 -1.76 2007-09-29 00:03:09 14 -1.83 2007-09-29 00:05:09 15 -1.86 2007-09-29 00:07:09 16 -1.94 2007-09-29 00:09:09 17 -1.87 2007-09-29 00:11:09 18 -1.87 2007-09-29 00:13:09 19 -1.80 2007-09-29 00:15:09 20 -1.64 2007-09-29 00:17:09 21 -1.60 2007-09-29 00:19:09 22 -1.90 2007-09-29 00:21:09 23 -2.08 2007-09-29 00:23:09 24 -1.94 2007-09-29 00:25:09 25 -2.12 2007-09-29 00:27:09 26 -1.87 2007-09-29 00:29:09 27 -2.18 2007-09-29 00:31:09 28 -1.98 2007-09-29 00:33:09 29 -1.73 2007-09-29 00:35:09 30 -1.84 2007-09-29 00:37:09 31 -2.04 2007-09-29 00:39:09 32 -1.86 2007-09-29 00:41:09 33 -1.94 2007-09-29 00:43:09 34 -1.77 2007-09-29 00:45:09 </code></pre> <p>And Expected results:</p> <pre><code>Hourly mean for 0:00 = average of values of (23:51, 0:01, 0:11, 0:21, 0:31, 0:41) </code></pre> <p>Hourly mean 0:00 = (-1.68+-1.64+-1.87+-1.90+-2.18+-1.86)/6</p>
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    1. COA corresponding sample output would help a lot.
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    2. CO@dezso, I have updated the question.
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    3. COSo you want to pick the (six) values which correspond to the same minutes everytime?
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