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Populate combobox

Help Please... I would like to populate a combo box on a form with a
query that compares data from two tables. Any record that is unique in
table1 should continue to populate my combobox. The instant the record
appears also in table2 it should no longer be listed in my combo box.
This is not a key field in either of the tables. Basically what I am
trying to do is prevent the user from entering duplicate values even
though it is not a key field. I am trying to do this by limiting their
choices in the combo box. There is a legitimate reason for neither
field being a key.

Thanks for your help

Jan 22 '06
11 12320
"DSR" <dr*******@hotm ail.com> wrote in
news:11******** **************@ g47g2000cwa.goo glegroups.com:
The main form is based on tblSuInfo. This form displays, in
textboxes, field data called SuLastName, SuFirstName, and
SuIDNum. The Subform is based on tblSurProc. It is linked to
the main table, on the many side of one to many, by the field
called SurIDNum (AutoNumber in the parent table and number in
the child table).
Pretty normal.

The ComboBox , which is on the subform, is there to offer choices to the user to add to the CredProc
field on the child table (tblSurProc). There is a third table
in the database that holds a field called AllProcAvail. I want
my comboBox to reflect all Records from the third table's
field (ProcName) but only those that don't already appear in
the field (CredProc) in tblSurProc, but this must only reflect
the current recordset based on SurIDNum from the main table
So you want the combo to lookup all the procedures except ones
already assigned to the child records having their foreign key
equal to the primary key of the parent form,

Have I understood correctly? If so, your combobox rowsource
would be:
SELECT AllProcAvail.Pr ocName from AllProcAvail
WHERE ProcName NOT IN (SELECT CredProc from tblSurProc WHERE
SurIDNum = forms!mainform! surIDNum);

* I don't know the name of your form so I called it mainform.
Change as required.

Once that's there you need to requery the combobox when the
mainform's record changes, so in the OnCurrent event put
me!subform.form !comboboxname.r equery
The third table doesn't need a relationship to the others since it just holds All Proc Names. If a new Proc
name is added to this field it must be reflected in my
comboBox. This whole scenario should allow for a different
record set based on which current SurIDNum I am viewing on my
main form.

I hope this is clear enough and I really do appreciate your

Bob Quintal

PA is y I've altered my email address.
Jan 22 '06 #11
I have it working now. I want to thank everyone that responded; each of
you helped tremendously.

Jan 25 '06 #12

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