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Re: Convert date and time colums to datetime
2+ messages / 2 participants
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* Re: Convert date and time colums to datetime
@ 2025-10-19 19:40 Rob Sargent <[email protected]>
  2025-10-19 20:38 ` Re: Convert date and time colums to datetime Rich Shepard <[email protected]>
  0 siblings, 1 reply; 2+ messages in thread

From: Rob Sargent @ 2025-10-19 19:40 UTC (permalink / raw)
  To: Rich Shepard <[email protected]>; +Cc: pgsql-general



> On Oct 19, 2025, at 1:08 PM, Rich Shepard <[email protected]> wrote:
> 
> On Sun, 19 Oct 2025, Laurenz Albe wrote:
> 
>> That depends on what you do with the table.
> 
> Laurenz,
> 
> That makes sense.
> 
>> Are your SQL statements simple and natural with the current design?
>> Then stick with what you have now.
> 
> That's what I'm going to do. I was curious when a timestamp column was more
> efficient, or otherwise preferred, since only a couple of my databases have
> a table with both date and time. And neither has many rows, but one could be
> quite large some time in the future.
> 
> Thanks very much,
> 
> Rich
> 
I think you have to ask why those values were separated in the first place. For instance if they are thought of as a pair in most queries then an alteration might be in order. There can be a large one time cost if these tables occur in a lot of separate sql calls in the business logic.

> 






^ permalink  raw  reply  [nested|flat] 2+ messages in thread

* Re: Convert date and time colums to datetime
  2025-10-19 19:40 Re: Convert date and time colums to datetime Rob Sargent <[email protected]>
@ 2025-10-19 20:38 ` Rich Shepard <[email protected]>
  0 siblings, 0 replies; 2+ messages in thread

From: Rich Shepard @ 2025-10-19 20:38 UTC (permalink / raw)
  To: pgsql-general

On Sun, 19 Oct 2025, Rob Sargent wrote:

> I think you have to ask why those values were separated in the first
> place. For instance if they are thought of as a pair in most queries then
> an alteration might be in order. There can be a large one time cost if
> these tables occur in a lot of separate sql calls in the business logic.

Rob,

Good point. They're in the contacts table and I use them to determine when
to make another contact and if prior contacts were more productive in the
morning or afternoon.

Thanks,

Rich






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