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help / color / mirror / Atom feedFrom: Andreas Joseph Krogh <andreas@visena.com>
To: pgsql-sql@postgresql.org
Subject: Re: GROUP BY overlapping (tsrange) entries
Date: Fri, 29 Jan 2016 02:11:52 +0100 (CET)
Message-ID: <VisenaEmail.b.916ec1039648dd16.1528aeb4a70@tc7-visena> (raw)
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På fredag 29. januar 2016 kl. 02:02:46, skrev Michael Moore <
michaeljmoore@gmail.com <mailto:michaeljmoore@gmail.com>>:
It is unclear to me how you got from your input data to your expected output.
If you are "trying to count() overlapping entries" then it would seem to me
that you would only have only one value for the count. Either a range overlaps
or it does not.
Oh, sorry, the count was in wrong order.
Let me explain,
insert into event(name, start_time, end_time) values('a', '2015-12-20', NULL)
, ('a', '2015-12-20', '2015-12-31') , ('a', '2015-12-25', '2016-01-01') , ('b',
'2015-11-20', '2015-11-24') , ('c', '2016-02-01', '2016-02-03') , ('c',
'2016-02-01', '2016-02-04') , ('c', '2016-02-01', NULL) ;
All 'a', 'b' and 'c' have points in common, with count a=3, b=1, c=3.
Thanks.
-- Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
andreas@visena.com <mailto:andreas@visena.com>
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Subject: Re: GROUP BY overlapping (tsrange) entries
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