Can I use "else if" in a trigger ?

My trigger works when I take out the "else if" part. Is there a way I can use something like the "else if" without getting compilation errors ? Either "nsn" or "load_date" is updated in the table ~ never both columns updated at the same time...
create or replace trigger upd_cib01_resolv_join_trg
after update on gateway.rpf_cib_resolved_join
for each row
when (old.scale_code = 'I4')
begin
if (:old.nsn != :new.nsn) then
update rpf_cib01_resolved_join
set nsn = :new.nsn
where cd_name = :old.cd_name and
zone_cell = :old.zone_cell and
frame_name = :old.frame_name;
else if (:old.load_date != :new.load_date) then
update rpf_cib01_resolved_join
set load_date = :new.load_date
where cd_name = :old.cd_name and
zone_cell = :old.zone_cell and
frame_name = :old.frame_name;
end if;
end;
thanks,
Vicki

The syntax is:
IF ...
ELSIF...
ELSE
END IF
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14261/controlstructures.htm#sthref894
So:
if (:old.nsn != :new.nsn) then
update rpf_cib01_resolved_join
set nsn = :new.nsn
where cd_name = :old.cd_name and
zone_cell = :old.zone_cell and
frame_name = :old.frame_name;
elsif (:old.load_date != :new.load_date) then
update rpf_cib01_resolved_join
set load_date = :new.load_date
where cd_name = :old.cd_name and
zone_cell = :old.zone_cell and
frame_name = :old.frame_name;
end if;
...HTH
Thomas

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Images of my current front panel and block diagram are attached. If you would rather have the actual VI's just let me know. Any help and/or explanation on this is greatly appreciated. Thanks in advance.
Attachments:
Front_Panel_Control.jpg ‏278 KB
Block_Diagram_Control.jpg ‏263 KB

Hello Cgifford,
Welcome to National Instruments Forums.
To output your signal to the PFI lines,
you can use external connectios between OUT0 and PFI lines. You can also use
the backplane to do so by routing into the same RTSI line.
1)
On the SCOPE and FGEN, the name of the
terminals are actually “PXI Trigger Line x/RTSIx” but on the 6602 you might
need to route the signal using the property:
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2)
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frequency is higher than this, you will have to use:
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section “Acquisition Functions Reading versus Fetching”).
3)
The short answer is yes. The longer one
might depend on how tight you need the synchronization to be (us, ns, ps). For
very tight synchronization, you should look into here.
Message Edited by Yardov on 06-18-2007 03:14 PM
Gerardo O.
RF Systems Engineering
National Instruments
Attachments:
property.JPG ‏7 KB

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