Re: SQL: How to delete records based on another file

You are welcome Glenn,
I was not sure that "Not Exists" would work. I also think that the
subselect could also have selected "1 from GoodFile b" instead of naming
all of the fields. The important part of the subselect is the WHERE
statement that matches records from GoodFile with BadFile. So the statement
could have looked like;

delete
from BadFile a
where not exists
(select 1
from GoodFile b
where a.company = b.company
and a.debtor = b.debtor
and a.cc = b.cc
and a.yy = b.yy
and a.mm = b.mm
and a.slsman = b.slsman )

Jim


On Tue, Jun 17, 2008 at 8:06 PM, Glenn Gundermann <ggundermann@xxxxxx>
wrote:

Jim,

Thank you very much for taking the time to reply and sharing your
knowledge!
This was very valuable and I can't thank you enough.

Take care,

Glenn Gundermann :-)
ggundermann@xxxxxx
Cell: 416-317-3144

----- Original Message -----
From: "Jim Essinger" <dilbernator@xxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Tuesday, June 17, 2008 12:57 AM
Subject: Re: SQL: How to delete records based on another file

Glen,
I would try something like this. I don't have a system available to test
on, so test well.

delete
from BadFile a
where not exists
(select b.company, b.debtor, b.cc, b,yy, b,mm, b,slsman
from GoodFile b
where a.company = b.company
and a.debtor = b.debtor
and a.cc = b.cc
and a.yy = b.yy
and a.mm = b.mm
and a.slsman = b.slsman )

HTH

Jim

On Mon, Jun 16, 2008 at 9:03 PM, Glenn Gundermann <ggundermann@xxxxxx>
wrote:

Hi folks,

I have a file with some extra records I would like to delete and I am
hoping someone can help me. Here is the scenario:

Let's say I have a file called GoodFile, and it has data like so:
company, debtor, cc, yy, mm, slsman, plus other fields
61,1234567, 20, 08, 01, 1234
61,1234567, 20, 08, 02, 5678
61,1234567, 20, 08, 03, 6789

Let's say I have another file called BadFile, and it has data like so:
company, debtor, cc, yy, mm, slsman, plus other fields
61,1234567, 20, 08, 01, 1234
61,1234567, 20, 08, 01, 4321
61,1234567, 20, 08, 01, 1111
61,1234567, 20, 08, 02, 5678
61,1234567, 20, 08, 02, 8765
61,1234567, 20, 08, 02, 2222
61,1234567, 20, 08, 03, 6789

I would like to remove the records from BadFile that don't have a match
(based on 6 fields shown) in GoodFile.

Thanks.

Glenn Gundermann
ggundermann@xxxxxx
New Cell #: 416-317-3144

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