RE: Using SQL for File Record Comparison

Something else to watch for would be records that are in FILEA, but NOT in
FILEB; and vice versa. You could get a count of those with exception joins.

# of records in FILEA with no matching records in FILEB
SELECT count(*)
FROM firstlib/mhrdclp a
EXCEPTION JOIN secondlib/mhrdclp b
ON a.mdvnda = b.mdvnda and a.mdmdl = b.mdmdl

# of records in FILEB with no matching records in FILEA
SELECT count(*)
FROM secondlib/mhrdclp b
EXCEPTION JOIN firstlib/mhrdclp a
ON a.mdvnda = b.mdvnda and a.mdmdl = b.mdmdl

Have fun!
Richard


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Michael Ryan
Sent: Wednesday, March 07, 2007 12:42 PM
To: Midrange Systems Technical Discussion
Subject: Re: Using SQL for File Record Comparison


Yup...I understand what you mean and I agree. The records in each file
are unique by mdvnda and mdmdl...there is only one record in each file
with those unique values.

On 3/7/07, Alan Shore <AlanShore@xxxxxxxx> wrote:

Be careful with this - I think
Are the records unique, in the sense of mdvnda & mdmdl
If these are NOT unique then you wont have a one to one comparison from 1
file to the other file and my thinking is that record 1 on FILEA will

equal

record 1 on FILEB, but record 2, 3, 4 & 5 on FILEB has the same mdvnda &
mdmdl as record 1 on FILEB, therefore record 1 on FILEA will not equal
records 2, 3, 4, & 5 on FILEB. Therefore the count will be 4.

Now - I've just re-read what I wrote. God I hope that makes sense.



Alan Shore

NBTY, Inc
(631) 244-2000 ext. 5019
AShore@xxxxxxxx

midrange-l-bounces@xxxxxxxxxxxx wrote on 03/07/2007 12:27:43 PM:

Does this make sense? Is there a better way? I'm trying to find out if
two files are the same. Here's my SQL statement:

SELECT count(*) FROM firstlib/mhrdclp a, secondlib/mhrdclp b where
a.mdvnda = b.mdvnda and a.mdmdl = b.mdmdl and (a.mddual <> b.mddual
or a.MDCMFRT <> b.MDCMFRT or a.MDLP <> b.MDLP or a.MDSF <> b.MDSF)

File MHRDCLP has the following fields:
mdvnda
mdmdl
mddual
mdcmfrt
mdlp
mdsf

I want to see if I have any records that match mdvnda and mdmdl have
any of the other four fields different.

Thanks!

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