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Re: Extract only maximum date from column
2+ messages / 2 participants
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* Re: Extract only maximum date from column
@ 2025-12-04 20:13 Rich Shepard <[email protected]>
  2025-12-04 20:24 ` Re: Extract only maximum date from column Bryan Sayer <[email protected]>
  0 siblings, 1 reply; 2+ messages in thread

From: Rich Shepard @ 2025-12-04 20:13 UTC (permalink / raw)
  To: [email protected]

On Thu, 4 Dec 2025, Bryan Sayer wrote:

> I believe in general you need
>
> having c.next_contact = max(c.next_contact)
>
> (at least in ANSI SQL) Use having for after the join has occurred

Bryan,

Postgresql didn't like that regardless of where I inserted the `having'
stanza.

Thanks,

Rich






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

* Re: Extract only maximum date from column
  2025-12-04 20:13 Re: Extract only maximum date from column Rich Shepard <[email protected]>
@ 2025-12-04 20:24 ` Bryan Sayer <[email protected]>
  0 siblings, 0 replies; 2+ messages in thread

From: Bryan Sayer @ 2025-12-04 20:24 UTC (permalink / raw)
  To: [email protected]

You don't include the where clause, just the having clause after the 
group by.

At least that is what I remember. But it has been awhile.

*Bryan Sayer*
Retired Demographer/Statistician
/In a world in which you can be anything, *be kind*/
On 12/4/2025 3:13 PM, Rich Shepard wrote:
> On Thu, 4 Dec 2025, Bryan Sayer wrote:
>
>> I believe in general you need
>>
>> having c.next_contact = max(c.next_contact)
>>
>> (at least in ANSI SQL) Use having for after the join has occurred
>
> Bryan,
>
> Postgresql didn't like that regardless of where I inserted the `having'
> stanza.
>
> Thanks,
>
> Rich
>
>

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

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2025-12-04 20:13 Re: Extract only maximum date from column Rich Shepard <[email protected]>
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