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Message-ID: <6b30ebac-6d6d-4c26-be73-de67e208e4e1@aklaver.com>
Date: Sun, 19 Oct 2025 07:53:56 -0700
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Subject: Re: Convert date and time colums to datetime
To: Rich Shepard <rshepard@appl-ecosys.com>, pgsql-general@postgresql.org
References: <63dfbc7c-bc63-7fa-a51b-915dd804ea2@appl-ecosys.com>
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From: Adrian Klaver <adrian.klaver@aklaver.com>
In-Reply-To: <63dfbc7c-bc63-7fa-a51b-915dd804ea2@appl-ecosys.com>
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On 10/19/25 07:43, Rich Shepard wrote:
> The database has a table with separate date and time columns.
> 
> 1. Are there benefits to merging the two into a single timestamp column?

1) One less column to fetch from.

2) If you really need a timestamp the work is already done, instead of 
building on the fly.

> 
> 2. If so, how would I do this? (Reading date/time operators and functions
> doc page hasn't shown me one.)

select ('10/19/2025'::date + '07:50'::time)::timestamptz;

timestamptz
------------------------
  2025-10-19 07:50:00-07

> 
> TIA,
> 
> Rich
> 
> 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com