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Subject: Re: Conversion from Number to Date
From: Scott Ribe <scott_ribe@elevated-dev.com>
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Date: Thu, 15 Jun 2023 20:29:59 -0600
Cc: "pgsql-admin@lists.postgresql.org" <pgsql-admin@lists.postgresql.org>
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To: M Sarwar <sarwarmd02@outlook.com>
Archived-At: 
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> On Jun 15, 2023, at 8:23 PM, M Sarwar <sarwarmd02@outlook.com> wrote:
>=20
> During the data load from CSV files to the database, the above =
START_TIME and STOP_TIME date column data arrived as number value.
> Now I need  to translate the START_TIME and STOP_TIME back to DATE =
format.

Add a number to a date, you get a date that many days out. Similarly, =
you can add an interval to a timestamp. So you'll need to know the base =
used for those numbers, and the unit of measurement.

For instance, if the numbers for date are an offset from 1970-01-01 =
(Unix epoch):

'1970-01-01'::date + <number>

If the numbers for time are seconds from then:

'1970-01-01'::timestamptz + '<number> seconds'::interval

Of course you'll also need to know what time zone the times are in, I =
will graciously leave that as an exercise ;-)

Also, the documentation page you needed:

https://www.postgresql.org/docs/15/functions-datetime.html