RE: Embedded SQL update a field based on difference of totals in 2 otherfiles

Jeff,

Try this:

ActSQL = 'Update DMVDRMST z +
                 Set z.AMDUE = +
                 Coalesce((Select Sum(i.INVAM) - Sum(p.PAYAM) +
                           From DMVDRMST v +
                             Left Outer Join +
                           VAINVWK i On v.VNDNR = i.VNDNR +
                             Left Outer Join +
                           VAPAYWK p On v.VNDNR = p.VNDNR), +
                           Cast(0.00 as Decimal(7,2))) +
                           where z.vndnr = v.vndnr';

You have to tie a record from the updated file to the subselect.  I'm
doing that here with the where z.vndnr = v.vndnr.  Note that I change to
correlation name on the update file from v to z so not to confuse it
with the DMVDRMST file in the subselect.

This would be a simpler form:
ActSQL = 'Update DMVDRMST v +
                 Set v.AMDUE = +
                 Coalesce((Select Sum(i.INVAM) - Sum(p.PAYAM) +
                           from VAINVWK i +
                             Left Outer Join +
                           VAPAYWK p On v.VNDNR = p.VNDNR), +
                           Cast(0.00 as Decimal(7,2)))
                           where v.VNDNR = i.VNDNR';

You shouldn't(?) need the DMVDRMST file in there twice.

HTH,

Charles Wilt
--
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
  

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx 
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff Crosby
Sent: Monday, September 11, 2006 2:59 PM
To: 'RPG programming on the AS400 / iSeries'
Subject: Embedded SQL update a field based on difference of 
totals in 2 otherfiles

All,

I hope I'm not overstaying my welcome with too many SQL 
questions, but I'm
really learning a lot from it, and I can't seem to find any 
examples that
fit this scenario.  Or else I'm just not hitting on the right 
search terms.
Or else you'll tell me I'm making it much harder than it needs to be.

We want to print a trial balance report "as of" a date in 
time.  To do this,
I created QTEMP work files: the vendor master file and the 2 related
transaction files (open invoices and unmatched payments).  Then I
programmatically determined, based on dates, which 
transactions were "open"
at that time, and inserted them into the QTEMP transaction 
files.  Now I
want to set the QTEMP vendor master file field AMDUE (amount 
due) to be the
net of those transactions, by vendor.

Here's what I tried:

ActSQL = 'Update DMVDRMST v +
                 Set v.AMDUE = +
                 Coalesce((Select Sum(i.INVAM) - Sum(p.PAYAM) +
                           From DMVDRMST v +
                             Left Outer Join +
                           VAINVWK i On v.VNDNR = i.VNDNR +
                             Left Outer Join +
                           VAPAYWK p On v.VNDNR = p.VNDNR), +
                           Cast(0.00 as Decimal(7,2)))';

Exec SQL Execute Immediate :ActSQL;

Don't laugh if this is really bad SQL <g>.  I dumped the 
program afterward.
Variable ActSQL has what I expect in it, and SQLSTT is 01504 
(UPDATE or
DELETE does not contain a WHERE clause).  But AMDUE in the master has
70,662.30 dollars in _every_ record of the master.  This 
70,662.30 figure is
the net of _all_ transactions for _all_ vendors.

Am I heading the right direction?

Thanks.

-- 
Jeff Crosby
Dilgard Frozen Foods, Inc.
P.O. Box 13369
Ft. Wayne, IN 46868-3369
260-422-7531

The opinions expressed are my own and not necessarily the 
opinion of my
company.  Unless I say so.


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