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From: Brent Wood <[email protected]>
To: [email protected] <[email protected]>
Subject: concatenating hstores in a group by?
Date: Fri, 17 Jan 2025 20:43:16 +0000
Message-ID: <SY7P300MB0761A579730344B2813CA07DA11B2@SY7P300MB0761.AUSP300.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <[email protected]>
References: <CH2PR01MB5765698BB9F71CEB662D5AE4AD1B2@CH2PR01MB5765.prod.exchangelabs.com>
	<[email protected]>

Hi,

I have a table with a timestamp and hstore columns with times in milliseconds.

I want to concatenate the hstores, grouped by timestamp, with the timestamps truncated to whole seconds: date_trunc('seconds', timer).

How can I concatenate all the hstores within a one second interval,

 ie, something like:

select timer,
              <hstores concatenated>
from (select  date_trunc('seconds', timer) as timer_sec, hstore)
group by timer;


Thanks


Brent Wood

Principal Technician, Fisheries
NIWA
DDI:  +64 (4) 3860529

[https://www.niwa.co.nz/static/niwa-2018-horizontal-180.png] <https://www.niwa.co.nz;
Brent Wood
Principal Technician - GIS and Spatial Data Management
Programme Leader - Environmental Information Delivery
+64-4-386-0529

National Institute of Water & Atmospheric Research Ltd (NIWA)
301 Evans Bay Parade Hataitai Wellington New Zealand
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