× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.


  1.  Home
  2. MIDRANGE-L
  3. March 2006

Re: the last instance of a record

select file.*
from file join (SELECT max(rrn(file)) as maxrrn
                from file
                group by keyfld) rrnf
on rrn(file) = maxrrn

On 3/19/06, rick baird <rick.baird@xxxxxxxxx> wrote:
> I've got a file with 2 or 3 years worth of history in it.  the key
> fields are not unique, so duplicates abound.
>
> I want to extract the last instance (by rrn) of each key value.
>
> will this work?
>
> copy the file (by rrn) to a sequencial file (this ?might? not be necessary?)
>
> create an empty duplicate file with unique keyword specified.
>
> cpyf to the empty file using *UPDADD
>
> sound kosher?

As an Amazon Associate we earn from qualifying purchases.

This thread ...
Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.