Re: Join 2 Logical Files

["Mark Walter" <mwalter@xxxxxxxxxx>]

Couldn't you use OPNQRYF and JDFTVAL(*YES)?
----- Original Message -----
From: <boothm@earth.Goddard.edu>
To: <RPG400-L@midrange.com>
Sent: Thursday, January 13, 2000 7:59 PM
Subject: RE: Join 2 Logical Files


> Why won't Matching Records work for you?  What is that?  maybe 8 lines of
> code in the RPG?
> _______________________
> Booth Martin
> boothm@earth.goddard.edu
> http://www.spy.net/~booth
> _______________________
>
>
>
>
> Alan Campin <Alan.Campin@CaseLogic.com>
> Sent by: owner-rpg400-l@midrange.com
> 01/13/2000 03:47 PM
> Please respond to RPG400-L
>
>
>         To:     "'RPG400-L@midrange.com'" <RPG400-L@midrange.com>
>         cc:
>         Subject:        RE: Join 2 Logical Files
>
>
> join will not work in OPNQRYF or SQL. Problem is:
>
> File 1 has key of Key1, Key5, Key8(Say customer number).
> File 2 has key of Key1, Key3, Key9
>
> Join would only read in records where there was a match between the key in
> file one and the key in file two. Records Key3, Key9 would not be included
> because there was no match. Got burnt on this one myself a few times.
>
> Just checked the manual(Should have done that first. Thought the AS/400
> didn't support it). What could be done is a CROSS JOIN. Will take every
> record from File one and concatenate with every record from file two.
>
> I assume (have not done) that you would get a record like this:
>
> Key1 Value from File one.
> Key1 Value from File two.
>
> Key3 Value from File one. Blank. No join.
> Key3 Value from File two.
>
> Key5 value from File one.
> Key5 value from file two. Blank. No join.
>
> etc.
>
> One concern here is if you do not have unique key on the files.
>
> For example, if you use customer number and you have 5 records with the
> same
> customer number in file one and 3 records in file two.
>
> The join would return 15 records I think. Read first record from file one
> and then join to 3 records in file two and then second record join to 3
> from
> the second, etc.
>
> Ouch. could get very interesting.
>
> -----Original Message-----
> From: alan shore [mailto:SHOREA@dime.com]
> Sent: Thursday, January 13, 2000 1:17 PM
> To: RPG400-L@midrange.com
> Subject: Re: Join 2 Logical Files
>
>
> Try using a join (inner, outer or partial) using the CL command OPNQRYF.
> I'm
> assuming there is some key or keys common to both files. The result of
> this
> is one file that can be read from beginning to end, or use the natural
> cycle.
>
> >>> <Gade_R_Reddy@consecofinance.com> 01/13 2:41 PM >>>
>
> Hey Guys,
>
> I have two logical files and my report is based on the union of all the
> data  from these two logical files.
>
> Now in my program i read the two logical files from BOF to EOF & created a
> physical file with the all data from the logical files & drive the report
> from there.
>
> Please suggest are there anyways to get the union of two logical files and
> how are SQL Views more advantages than Logical Files????
>
> Thanks.
> Gade.
>
>
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