From: | stefano bonnin <stefano(dot)bonnin(at)gmail(dot)com> |
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To: | pgsql-general(at)postgresql(dot)org |
Subject: | Given N, finding the interval of N hours with max(sum(..)) |
Date: | 2010-06-17 06:17:33 |
Message-ID: | AANLkTimKVsr8Y5g_ReVAylAiJcWBDwtajTTcEKWgIdMP@mail.gmail.com |
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Lists: | pgsql-general |
Hi all,
I'm trying to make a query that, given N and a date, gives me the interval
of N hours with the max(sum(...)). In others words, given the following
table:
2010-06-16 00:00:00 | 0
2010-06-16 01:00:00 | 2
2010-06-16 02:00:00 | 1
2010-06-16 03:00:00 | 5
2010-06-16 04:00:00 | 7
2010-06-16 05:00:00 | 9
2010-06-16 06:00:00 | 2
2010-06-16 07:00:00 | 0
2010-06-16 08:00:00 | 0
2010-06-16 09:00:00 | 0
2010-06-16 10:00:00 | 1
2010-06-16 11:00:00 | 2
2010-06-16 12:00:00 | 1
2010-06-16 13:00:00 | 1
2010-06-16 14:00:00 | 1
2010-06-16 15:00:00 | 1
2010-06-16 16:00:00 | 1
2010-06-16 17:00:00 | 1
2010-06-16 18:00:00 | 1
2010-06-16 19:00:00 | 1
2010-06-16 20:00:00 | 1
2010-06-16 21:00:00 | 0
2010-06-16 22:00:00 | 3
2010-06-16 23:00:00 | 1
With N = 3 and date = '2010-06-16' for example ... I'd like that the "query"
gives me as response: the interval from 3AM and 5AM.
Any solutions and/or hints?
Thanks in advance.
stefano
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