Re: Refining query statement

On 1/15/19 8:02 AM, Ron wrote:

>> the best way to do it:
>>
>> So we end up with something like this:
>>
>>      select distinct on (C.contact_id) C.contact_id, C.lname, C.fname,
>> C.direct_phone, O.org_name, A.next_contact
>>      from Contacts as C
>>        join Organizations as O on C.org_id = O.org_id
>>        join Activities as A on C.contact_id = A.contact_id
>>      where A.next_contact <= 'today'
>>        and A.next_contact > '2018-12-31'
>>      order by c.contact_id, a.next_contact DESC;
>
> And I've never liked this method (though I'm old and crotchety)....
>

What is the specific objection?

To me:

1) Plus side. It saves an explicit sub-query

2) Minus side. It is not portable. But then complete portability is a
unicorn in my opinion.

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com