Re: Convert date and time colums to datetime

From: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
To: Rich Shepard <rshepard(at)appl-ecosys(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: Convert date and time colums to datetime
Date: 2025-10-19 14:53:56
Message-ID: 6b30ebac-6d6d-4c26-be73-de67e208e4e1@aklaver.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(dot)klaver(at)aklaver(dot)com

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