RE: SQL Help finding missing records

Thanks Eric,
As always you are most helpful. That did the trick.........

And to everyone else I thank you as well............your suggestions were
all appreciated.

Douglas




From:
"DeLong, Eric" <EDeLong@xxxxxxxxxxxxxxx>
To:
"RPG programming on the AS400 / iSeries" <rpg400-l@xxxxxxxxxxxx>
Date:
07/16/2008 09:36 AM
Subject:
RE: SQL Help finding missing records



Hi Doug,

Sounds line a job for EXCEPTION JOIN......
Select detl.* from detl exception join hdr on
(detl.key=hdr.key)

though there are many other alternatives....
Select detl.* from detl where not exists (select * from
hdr where hdr.key = detl.key)

The second version, using the "not exists" clause is actually the more
useful of the two solutions, because it is compatible with other SQL verbs
beside SELECT.... For example, if you wanted to delete these orphaned
records, you would NOT be able to do it with the exception join.... not
allowed...

Delete from detl where not exists (select * from hdr
where hdr.key = detl.key)

hth,
Eric DeLong

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of Doug Palme
Sent: Wednesday, July 16, 2008 9:19 AM
To: RPG Midrange L
Subject: SQL Help finding missing records


I know I can do this with query, but in the spirit of learning - I would
prefer to do this with SQL.

I have two files SLSTRNHDRF - header file and SLSTRAN - Detail
file.....apparently we have some detail records that do not have a
corresponding header record and I want to double check the file and see if

there any more......I thought I could do it by querying the header file
for account / invoice records that do not match account and invoice fields

in the slstran.....but that did not seem to work.....

Suggestions?


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