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If you don't have the where clause, you can get errors when there's no
match found in WCS. Unless INV.FEAT is a null-capable field, in which
case it will be set to null.
At least, that's what my gut feeling says, I've never used null before.
HTH,
Peter Colpaert
Application Developer
PLI - IT - Kontich, Belgium
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Yoda of Borg are we. Futile is resistance, assimilated will you be.
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"Michael Ryan" <michaelrtr@xxxxxxxxx>
Sent by: midrange-l-bounces@xxxxxxxxxxxx
10/01/2008 15:22
Please respond to
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
To
"Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
cc
Subject
Re: SQL Update with Join
Very nice guys...that's for the help. Now, for my edification, what's
the difference between Peter's, Alan's and Guy's approaches? Peter is
selecting one, right? And Alan is selecting any, but will get the
first (or only)? And Guy is doing a straight select? What's the
difference/advantage in using the EXISTS clause? Thanks!
On Jan 10, 2008 8:50 AM, <GUY_HENZA@xxxxxxxxxxxxxx> wrote:
update inv set inv.feat = (select wcs.feat from wcs where INV.VND =
WCS.VND
and INV.MDL = WCS.MDL)
Regards,
Guy
midrange.com
