Recordset in subform based on field in parent form

Hi,
I am working on a genealogy form. The only table (so far) lists everybody
in the family, one record per person. Each record has an autonum ID.

The parent form (frmMainForm) displays the data in each record, which
includes the ID of the father and the mother (who also have records in the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a subform
(sfmSiblings) in which I wish to list all the brothers and sisters of the
person currently being displayed in the main form. The basis of the
selection is all records which have the same father ID or mother ID field
values (excluding of course the person displayed in the main form). I am
trying to use the values in the controls on the main form where the father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I hardcoded
test values for the father ID and mother ID. This works fine. Then I added
this form as a subform in the Tab Control of the main form. I viewed the
SQL for the query and updated it by substituting the values of the controls
on the main form for the hardcoding. That is, instead of using the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother =
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main form, for
each record I get msgboxes prompting for the values frmMainForm!IDFath and
frmMainForm!IDMoth. If I respond with the correct values, the subform
displays the correct data.

I hope that this makes some sense. Essentially my question is: how can I
make the query in the subform use criteria displayed in controls on the main
form?

Another aspect of this is that all the books and tutorials I have seen
assume that the subform will be used to display data from a different but
related table from the record in the main form. In my case, there is only
one table and I want to display related records (via the parent IDs) from
that same table. Am I not allowed to do this? Or will I need some sort of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Hi Lyn

You could try:
WHERE (Person.IDFather = Nz(Forms!frmMainForm!IDFath,0))
OR (Person.IDMother = Nz(Forms!frmMainForm!IDMoth,0))

The Nz() should cope with the case where the main form is at a new record.
However, you will probably get an initial error on load, because Access
loads the subform before the main form.

On your broader question, you can join a table to itself, by dragging
multiple copies of the table into the Relationships window. There is an
example of this with animal pedigrees at:
http://allenbrowne.com/ser-06.html

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...

I am working on a genealogy form. The only table (so far) lists everybody
in the family, one record per person. Each record has an autonum ID.

The parent form (frmMainForm) displays the data in each record, which
includes the ID of the father and the mother (who also have records in the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a subform
(sfmSiblings) in which I wish to list all the brothers and sisters of the
person currently being displayed in the main form. The basis of the
selection is all records which have the same father ID or mother ID field
values (excluding of course the person displayed in the main form). I am
trying to use the values in the controls on the main form where the father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I
hardcoded
test values for the father ID and mother ID. This works fine. Then I
added
this form as a subform in the Tab Control of the main form. I viewed the
SQL for the query and updated it by substituting the values of the
controls
on the main form for the hardcoding. That is, instead of using the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother =
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main form, for
each record I get msgboxes prompting for the values frmMainForm!IDFath and
frmMainForm!IDMoth. If I respond with the correct values, the subform
displays the correct data.

I hope that this makes some sense. Essentially my question is: how can I
make the query in the subform use criteria displayed in controls on the
main
form?

Another aspect of this is that all the books and tutorials I have seen
assume that the subform will be used to display data from a different but
related table from the record in the main form. In my case, there is only
one table and I want to display related records (via the parent IDs) from
that same table. Am I not allowed to do this? Or will I need some sort
of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Lyn, just put the following in the criteria line of the query:

[Forms]![frmMainForm]![IDFath] Or [Forms]![frmMainForm]![IDMoth]

Hope it helps!
--
Reggie

www.smittysinet.com
----------
"Lyn" wrote in message
...
Hi,
I am working on a genealogy form. The only table (so far) lists everybody
in the family, one record per person. Each record has an autonum ID.

The parent form (frmMainForm) displays the data in each record, which
includes the ID of the father and the mother (who also have records in the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a subform
(sfmSiblings) in which I wish to list all the brothers and sisters of the
person currently being displayed in the main form. The basis of the
selection is all records which have the same father ID or mother ID field
values (excluding of course the person displayed in the main form). I am
trying to use the values in the controls on the main form where the father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I
hardcoded
test values for the father ID and mother ID. This works fine. Then I
added
this form as a subform in the Tab Control of the main form. I viewed the
SQL for the query and updated it by substituting the values of the
controls
on the main form for the hardcoding. That is, instead of using the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother =
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main form, for
each record I get msgboxes prompting for the values frmMainForm!IDFath and
frmMainForm!IDMoth. If I respond with the correct values, the subform
displays the correct data.

I hope that this makes some sense. Essentially my question is: how can I
make the query in the subform use criteria displayed in controls on the
main
form?

Another aspect of this is that all the books and tutorials I have seen
assume that the subform will be used to display data from a different but
related table from the record in the main form. In my case, there is only
one table and I want to display related records (via the parent IDs) from
that same table. Am I not allowed to do this? Or will I need some sort
of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Allen,
Thanks for your suggestions. The animal pedigree tip looks very similar to
what I am doing. I will give this a try.

BTW, I live in Sydney.

--
Cheers,
Lyn.

"Allen Browne" wrote in message
u...
Hi Lyn

You could try:
WHERE (Person.IDFather = Nz(Forms!frmMainForm!IDFath,0))
OR (Person.IDMother = Nz(Forms!frmMainForm!IDMoth,0))

The Nz() should cope with the case where the main form is at a new record.
However, you will probably get an initial error on load, because Access
loads the subform before the main form.

On your broader question, you can join a table to itself, by dragging
multiple copies of the table into the Relationships window. There is an
example of this with animal pedigrees at:
http://allenbrowne.com/ser-06.html

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...

I am working on a genealogy form. The only table (so far) lists
everybody
in the family, one record per person. Each record has an autonum ID.

The parent form (frmMainForm) displays the data in each record, which
includes the ID of the father and the mother (who also have records in
the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a
subform
(sfmSiblings) in which I wish to list all the brothers and sisters of
the
person currently being displayed in the main form. The basis of the
selection is all records which have the same father ID or mother ID
field
values (excluding of course the person displayed in the main form). I
am
trying to use the values in the controls on the main form where the
father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I
hardcoded
test values for the father ID and mother ID. This works fine. Then I
added
this form as a subform in the Tab Control of the main form. I viewed
the
SQL for the query and updated it by substituting the values of the
controls
on the main form for the hardcoding. That is, instead of using the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother =
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main form,
for
each record I get msgboxes prompting for the values frmMainForm!IDFath
and
frmMainForm!IDMoth. If I respond with the correct values, the subform
displays the correct data.

I hope that this makes some sense. Essentially my question is: how can
I
make the query in the subform use criteria displayed in controls on the
main
form?

Another aspect of this is that all the books and tutorials I have seen
assume that the subform will be used to display data from a different
but
related table from the record in the main form. In my case, there is
only
one table and I want to display related records (via the parent IDs)
from
that same table. Am I not allowed to do this? Or will I need some sort
of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Thanks Reggie. From all the responses, it looks as though the main thing I
was missing was the "Forms!" prefix. I have gotten too used to the "Me!"
shortcut which of course does not work here.

--
Cheers,
Lyn.


"Reggie" wrote in message
...
Lyn, just put the following in the criteria line of the query:

[Forms]![frmMainForm]![IDFath] Or [Forms]![frmMainForm]![IDMoth]

Hope it helps!
--
Reggie

www.smittysinet.com
----------
"Lyn" wrote in message
...
Hi,
I am working on a genealogy form. The only table (so far) lists
everybody
in the family, one record per person. Each record has an autonum ID.

The parent form (frmMainForm) displays the data in each record, which
includes the ID of the father and the mother (who also have records in
the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a
subform
(sfmSiblings) in which I wish to list all the brothers and sisters of
the
person currently being displayed in the main form. The basis of the
selection is all records which have the same father ID or mother ID
field
values (excluding of course the person displayed in the main form). I
am
trying to use the values in the controls on the main form where the
father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I
hardcoded
test values for the father ID and mother ID. This works fine. Then I
added
this form as a subform in the Tab Control of the main form. I viewed
the
SQL for the query and updated it by substituting the values of the
controls
on the main form for the hardcoding. That is, instead of using the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother =
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main form,
for
each record I get msgboxes prompting for the values frmMainForm!IDFath
and
frmMainForm!IDMoth. If I respond with the correct values, the subform
displays the correct data.

I hope that this makes some sense. Essentially my question is: how can
I
make the query in the subform use criteria displayed in controls on the
main
form?

Another aspect of this is that all the books and tutorials I have seen
assume that the subform will be used to display data from a different
but
related table from the record in the main form. In my case, there is
only
one table and I want to display related records (via the parent IDs)
from
that same table. Am I not allowed to do this? Or will I need some sort
of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Thanks again to everyone who responded to my original question. I think
Allen was right, using a control value in the main form as a criterion does
not work because the subform loads before the main form.

The Person record must be available before the main form or subform opens.
So I have tried using multiple copies of the table (Person) in the query
(with alias names) with different types of joins. Firstly, just the one
alias (Person_Sib) joined by the IDFather field in each table (I have left
out IDMother for simplicity). The Person table in the query is intended to
be the record in the main form, and the Person_Sib alias is intended to find
all the records with the same IDFather. However, in this case, Person_Sib
just seems to track Person -- ie, Person_Sib returns only the same (single)
record as Person.

So I have tried a different tack. I inserted a second alias of Person
(Person_Father) between the two original tables in the query. In this case,
Person.IDFather is joined to Person_Father.IDPerson (the autonum record ID)
which is joined to Person_Sib.IDFather. At this point I got confused over
what sort of joins to use. Using INNER joins for both (which I am sure is
wrong), Person_Sib still seems to track the same record as Person.

The Person record is the subject of the main form. I need the Person_Sib
alias to list ALL records with the same IDFather (and eventually "OR same
IDMother"). I will of course eventually filter out the Person_Sib record
that matches the Person in the main form (who cannot be his/her own
sibling). How can I do this in the Access query? Or do I have to resort to
VBA to create the sibling recordset? What am I doing wrong? (I hope that
this makes sense.)

Thanks for any further assistance.
--
Cheers,
Lyn.

"Allen Browne" wrote in message
u...
Hi Lyn

You could try:
WHERE (Person.IDFather = Nz(Forms!frmMainForm!IDFath,0))
OR (Person.IDMother = Nz(Forms!frmMainForm!IDMoth,0))

The Nz() should cope with the case where the main form is at a new record.
However, you will probably get an initial error on load, because Access
loads the subform before the main form.

On your broader question, you can join a table to itself, by dragging
multiple copies of the table into the Relationships window. There is an
example of this with animal pedigrees at:
http://allenbrowne.com/ser-06.html

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...

I am working on a genealogy form. The only table (so far) lists
everybody
in the family, one record per person. Each record has an autonum ID.

The parent form (frmMainForm) displays the data in each record, which
includes the ID of the father and the mother (who also have records in
the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a
subform
(sfmSiblings) in which I wish to list all the brothers and sisters of
the
person currently being displayed in the main form. The basis of the
selection is all records which have the same father ID or mother ID
field
values (excluding of course the person displayed in the main form). I
am
trying to use the values in the controls on the main form where the
father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I
hardcoded
test values for the father ID and mother ID. This works fine. Then I
added
this form as a subform in the Tab Control of the main form. I viewed
the
SQL for the query and updated it by substituting the values of the
controls
on the main form for the hardcoding. That is, instead of using the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother =
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main form,
for
each record I get msgboxes prompting for the values frmMainForm!IDFath
and
frmMainForm!IDMoth. If I respond with the correct values, the subform
displays the correct data.

I hope that this makes some sense. Essentially my question is: how can
I
make the query in the subform use criteria displayed in controls on the
main
form?

Another aspect of this is that all the books and tutorials I have seen
assume that the subform will be used to display data from a different
but
related table from the record in the main form. In my case, there is
only
one table and I want to display related records (via the parent IDs)
from
that same table. Am I not allowed to do this? Or will I need some sort
of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Could you set the subform so it intially loads no-one:
SELECT * FROM MyTable WHERE (False);

Then use the Current event of the main form to assign its RecordSource.
Something like this:
Dim strWhere As String

If Me.NewRecord Then
strWhere = "(False);"
Else
strWhere = "(Person_Father.IDPerson = " & Me.IDPerson & ") OR
(Person_Mother.IDPerson = " & Me.IDPerson & ");"
Me.[Child1].Form.RecordSource = "SELECT * FROM SomeTable WHERE " &
strWhere
End If

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...
Thanks again to everyone who responded to my original question. I think
Allen was right, using a control value in the main form as a criterion
does
not work because the subform loads before the main form.

The Person record must be available before the main form or subform opens.
So I have tried using multiple copies of the table (Person) in the query
(with alias names) with different types of joins. Firstly, just the one
alias (Person_Sib) joined by the IDFather field in each table (I have left
out IDMother for simplicity). The Person table in the query is intended
to
be the record in the main form, and the Person_Sib alias is intended to
find
all the records with the same IDFather. However, in this case, Person_Sib
just seems to track Person -- ie, Person_Sib returns only the same
(single)
record as Person.

So I have tried a different tack. I inserted a second alias of Person
(Person_Father) between the two original tables in the query. In this
case,
Person.IDFather is joined to Person_Father.IDPerson (the autonum record
ID)
which is joined to Person_Sib.IDFather. At this point I got confused over
what sort of joins to use. Using INNER joins for both (which I am sure is
wrong), Person_Sib still seems to track the same record as Person.

The Person record is the subject of the main form. I need the Person_Sib
alias to list ALL records with the same IDFather (and eventually "OR same
IDMother"). I will of course eventually filter out the Person_Sib record
that matches the Person in the main form (who cannot be his/her own
sibling). How can I do this in the Access query? Or do I have to resort
to
VBA to create the sibling recordset? What am I doing wrong? (I hope that
this makes sense.)

Thanks for any further assistance.
--
Cheers,
Lyn.

"Allen Browne" wrote in message
u...
Hi Lyn

You could try:
WHERE (Person.IDFather = Nz(Forms!frmMainForm!IDFath,0))
OR (Person.IDMother = Nz(Forms!frmMainForm!IDMoth,0))

The Nz() should cope with the case where the main form is at a new
record.
However, you will probably get an initial error on load, because Access
loads the subform before the main form.

On your broader question, you can join a table to itself, by dragging
multiple copies of the table into the Relationships window. There is an
example of this with animal pedigrees at:
http://allenbrowne.com/ser-06.html

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...

I am working on a genealogy form. The only table (so far) lists
everybody
in the family, one record per person. Each record has an autonum ID.

The parent form (frmMainForm) displays the data in each record, which
includes the ID of the father and the mother (who also have records in
the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a
subform
(sfmSiblings) in which I wish to list all the brothers and sisters of
the
person currently being displayed in the main form. The basis of the
selection is all records which have the same father ID or mother ID
field
values (excluding of course the person displayed in the main form). I
am
trying to use the values in the controls on the main form where the
father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I
hardcoded
test values for the father ID and mother ID. This works fine. Then I
added
this form as a subform in the Tab Control of the main form. I viewed
the
SQL for the query and updated it by substituting the values of the
controls
on the main form for the hardcoding. That is, instead of using the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother =
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main form,
for
each record I get msgboxes prompting for the values frmMainForm!IDFath
and
frmMainForm!IDMoth. If I respond with the correct values, the subform
displays the correct data.

I hope that this makes some sense. Essentially my question is: how
can
I
make the query in the subform use criteria displayed in controls on
the
main
form?

Another aspect of this is that all the books and tutorials I have seen
assume that the subform will be used to display data from a different
but
related table from the record in the main form. In my case, there is
only
one table and I want to display related records (via the parent IDs)
from
that same table. Am I not allowed to do this? Or will I need some
sort
of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Allen,
I have tried your suggestion and variations of it, but no luck. After a lot
of trial and error, I have resorted to using VBA code similar to what you
provided in your previous. I have simplified the requirements to the bare
minimum, just to get something that works, then I can build it up again.

I now have a form containing a subform (sfmSibs) in a tab control. I have
removed any query from the subform's Record Source.

In the Current event for the main form, which I already use to populate some
unbound controls on the main form, I have added the following code:

Dim mySQL As String

If Not IsNull(Me![IDFather]) And Me![IDFather] 0 Then
mySQL = "SELECT Person.SurnameBirth, Person.FirstName, " & _
"Person.DOB, Person.Sex, " & _
"Person.IDPerson FROM Person " & _
"WHERE Person.IDFather = " & Me![IDFather] & ";"
Me.[sfmSibs].Form.RecordSource = mySQL
End If

When I run this, if Me![IDFather] is null or zero, of course it works (blank
form as expected). However, any record with a non-zero Me![IDFather] gives
this error:

Run-time error '2465':
Microsoft Office Access can't find the field "|"
referred to in your expression.

Not very helpful, as I don't have "|" anywhere in the expression. (Once
when I mistyped a word, this error message displayed the word in error, but
not this time.)

When I click Debug, the following line is highlighted:

Me.[sfmSibs].Form.RecordSource = mySQL

I presume that the problem is somewhere in the mySQL string. I have tried
it with and without the terminating semicolon ";" (VBA often seems to insert
that for you), but no effect.

Any ideas how to troubleshoot this when the field in error is quoted as "|"
?!?!

A related question: instead of doing this in the Current event of the main
form, could I do it in the On Click event of the tab control Page? So that
the subform is not populated unless the relevant tab is clicked. Just
trying to learn as much as I can from this.

Thanks again for your help.

--
Cheers,
Lyn.

"Allen Browne" wrote in message
. au...
Could you set the subform so it intially loads no-one:
SELECT * FROM MyTable WHERE (False);

Then use the Current event of the main form to assign its RecordSource.
Something like this:
Dim strWhere As String

If Me.NewRecord Then
strWhere = "(False);"
Else
strWhere = "(Person_Father.IDPerson = " & Me.IDPerson & ") OR
(Person_Mother.IDPerson = " & Me.IDPerson & ");"
Me.[Child1].Form.RecordSource = "SELECT * FROM SomeTable WHERE " &
strWhere
End If

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...
Thanks again to everyone who responded to my original question. I think
Allen was right, using a control value in the main form as a criterion
does
not work because the subform loads before the main form.

The Person record must be available before the main form or subform
opens.
So I have tried using multiple copies of the table (Person) in the query
(with alias names) with different types of joins. Firstly, just the one
alias (Person_Sib) joined by the IDFather field in each table (I have
left
out IDMother for simplicity). The Person table in the query is intended
to
be the record in the main form, and the Person_Sib alias is intended to
find
all the records with the same IDFather. However, in this case,
Person_Sib
just seems to track Person -- ie, Person_Sib returns only the same
(single)
record as Person.

So I have tried a different tack. I inserted a second alias of Person
(Person_Father) between the two original tables in the query. In this
case,
Person.IDFather is joined to Person_Father.IDPerson (the autonum record
ID)
which is joined to Person_Sib.IDFather. At this point I got confused
over
what sort of joins to use. Using INNER joins for both (which I am sure
is
wrong), Person_Sib still seems to track the same record as Person.

The Person record is the subject of the main form. I need the
Person_Sib
alias to list ALL records with the same IDFather (and eventually "OR
same
IDMother"). I will of course eventually filter out the Person_Sib
record
that matches the Person in the main form (who cannot be his/her own
sibling). How can I do this in the Access query? Or do I have to
resort
to
VBA to create the sibling recordset? What am I doing wrong? (I hope
that
this makes sense.)

Thanks for any further assistance.
--
Cheers,
Lyn.

"Allen Browne" wrote in message
u...
Hi Lyn

You could try:
WHERE (Person.IDFather = Nz(Forms!frmMainForm!IDFath,0))
OR (Person.IDMother = Nz(Forms!frmMainForm!IDMoth,0))

The Nz() should cope with the case where the main form is at a new
record.
However, you will probably get an initial error on load, because
Access
loads the subform before the main form.

On your broader question, you can join a table to itself, by dragging
multiple copies of the table into the Relationships window. There is
an
example of this with animal pedigrees at:
http://allenbrowne.com/ser-06.html

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...

I am working on a genealogy form. The only table (so far) lists
everybody
in the family, one record per person. Each record has an autonum
ID.

The parent form (frmMainForm) displays the data in each record,
which
includes the ID of the father and the mother (who also have records
in
the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a
subform
(sfmSiblings) in which I wish to list all the brothers and sisters
of
the
person currently being displayed in the main form. The basis of the
selection is all records which have the same father ID or mother ID
field
values (excluding of course the person displayed in the main form).
I
am
trying to use the values in the controls on the main form where the
father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I
hardcoded
test values for the father ID and mother ID. This works fine. Then
I
added
this form as a subform in the Tab Control of the main form. I
viewed
the
SQL for the query and updated it by substituting the values of the
controls
on the main form for the hardcoding. That is, instead of using the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother =
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main
form,
for
each record I get msgboxes prompting for the values
frmMainForm!IDFath
and
frmMainForm!IDMoth. If I respond with the correct values, the
subform
displays the correct data.

I hope that this makes some sense. Essentially my question is: how
can
I
make the query in the subform use criteria displayed in controls on
the
main
form?

Another aspect of this is that all the books and tutorials I have
seen
assume that the subform will be used to display data from a
different
but
related table from the record in the main form. In my case, there
is
only
one table and I want to display related records (via the parent IDs)
from
that same table. Am I not allowed to do this? Or will I need some
sort
of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Hi Lyn.

To debug this, ask Access to print mySQL out to the immediate window:
mySQL = "SELECT ...
Debug.Print mySQL
Me.[sfmSibs].Form...

Now try it. Open the Immediate window (Ctrl+G). Access will have printed the
faulty SQL statement there. Copy it to clipboard. Then create a new query,
switch it to SQL View (View menu), and paste in the faulty SQL string. This
should help you to see what's wrong, and you will see how to fix the
assigment to mySQL.

The pipe character is a place holder for the field name. It appears that you
are getting the error message without the correct name being inserted into
the place holder. Ultimately it means that Access can't make sense of the
SQL statement. For example, if IDFather is actually a Text field (not a
Number field), then the SQL statement needs exta quote marks:
"WHERE Person.IDFather = """ & Me![IDFather] & """;"

Another cause of the error is Name AutoCorrect incorrectly tracking the
field name. Uncheck the boxes under Tools | Options | General | Name
AutoCorrect, and then compact the database (Tools | Database Utilities).

You're on the right track, so it is worth continuing to debug this. Do
include the trailing semicolon in the sql statement.

It would be possible to use the Change event of the tab control (not the
Click event of the page) rather than the Current event of the main form. The
problem with that approach is that it leaves the wrong data showing in the
subform when you change record in the main form, until you move to a
different tab and move back to the one you want again.

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...
Allen,
I have tried your suggestion and variations of it, but no luck. After a
lot
of trial and error, I have resorted to using VBA code similar to what you
provided in your previous. I have simplified the requirements to the bare
minimum, just to get something that works, then I can build it up again.

I now have a form containing a subform (sfmSibs) in a tab control. I have
removed any query from the subform's Record Source.

In the Current event for the main form, which I already use to populate
some
unbound controls on the main form, I have added the following code:

Dim mySQL As String

If Not IsNull(Me![IDFather]) And Me![IDFather] 0 Then
mySQL = "SELECT Person.SurnameBirth, Person.FirstName, " & _
"Person.DOB, Person.Sex, " & _
"Person.IDPerson FROM Person " & _
"WHERE Person.IDFather = " & Me![IDFather] & ";"
Me.[sfmSibs].Form.RecordSource = mySQL
End If

When I run this, if Me![IDFather] is null or zero, of course it works
(blank
form as expected). However, any record with a non-zero Me![IDFather]
gives
this error:

Run-time error '2465':
Microsoft Office Access can't find the field "|"
referred to in your expression.

Not very helpful, as I don't have "|" anywhere in the expression. (Once
when I mistyped a word, this error message displayed the word in error,
but
not this time.)

When I click Debug, the following line is highlighted:

Me.[sfmSibs].Form.RecordSource = mySQL

I presume that the problem is somewhere in the mySQL string. I have tried
it with and without the terminating semicolon ";" (VBA often seems to
insert
that for you), but no effect.

Any ideas how to troubleshoot this when the field in error is quoted as
"|"
?!?!

A related question: instead of doing this in the Current event of the main
form, could I do it in the On Click event of the tab control Page? So
that
the subform is not populated unless the relevant tab is clicked. Just
trying to learn as much as I can from this.

Thanks again for your help.

--
Cheers,
Lyn.

"Allen Browne" wrote in message
. au...
Could you set the subform so it intially loads no-one:
SELECT * FROM MyTable WHERE (False);

Then use the Current event of the main form to assign its RecordSource.
Something like this:
Dim strWhere As String

If Me.NewRecord Then
strWhere = "(False);"
Else
strWhere = "(Person_Father.IDPerson = " & Me.IDPerson & ") OR
(Person_Mother.IDPerson = " & Me.IDPerson & ");"
Me.[Child1].Form.RecordSource = "SELECT * FROM SomeTable WHERE "
&
strWhere
End If

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...
Thanks again to everyone who responded to my original question. I
think
Allen was right, using a control value in the main form as a criterion
does
not work because the subform loads before the main form.

The Person record must be available before the main form or subform
opens.
So I have tried using multiple copies of the table (Person) in the
query
(with alias names) with different types of joins. Firstly, just the
one
alias (Person_Sib) joined by the IDFather field in each table (I have
left
out IDMother for simplicity). The Person table in the query is
intended
to
be the record in the main form, and the Person_Sib alias is intended
to
find
all the records with the same IDFather. However, in this case,
Person_Sib
just seems to track Person -- ie, Person_Sib returns only the same
(single)
record as Person.

So I have tried a different tack. I inserted a second alias of Person
(Person_Father) between the two original tables in the query. In this
case,
Person.IDFather is joined to Person_Father.IDPerson (the autonum
record
ID)
which is joined to Person_Sib.IDFather. At this point I got confused
over
what sort of joins to use. Using INNER joins for both (which I am
sure
is
wrong), Person_Sib still seems to track the same record as Person.

The Person record is the subject of the main form. I need the
Person_Sib
alias to list ALL records with the same IDFather (and eventually "OR
same
IDMother"). I will of course eventually filter out the Person_Sib
record
that matches the Person in the main form (who cannot be his/her own
sibling). How can I do this in the Access query? Or do I have to
resort
to
VBA to create the sibling recordset? What am I doing wrong? (I hope
that
this makes sense.)

Thanks for any further assistance.
--
Cheers,
Lyn.

"Allen Browne" wrote in message
u...
Hi Lyn

You could try:
WHERE (Person.IDFather = Nz(Forms!frmMainForm!IDFath,0))
OR (Person.IDMother = Nz(Forms!frmMainForm!IDMoth,0))

The Nz() should cope with the case where the main form is at a new
record.
However, you will probably get an initial error on load, because
Access
loads the subform before the main form.

On your broader question, you can join a table to itself, by
dragging
multiple copies of the table into the Relationships window. There is
an
example of this with animal pedigrees at:
http://allenbrowne.com/ser-06.html

"Lyn" wrote in message
...

I am working on a genealogy form. The only table (so far) lists
everybody
in the family, one record per person. Each record has an autonum
ID.

The parent form (frmMainForm) displays the data in each record,
which
includes the ID of the father and the mother (who also have
records
in
the
table). One record per form.

I have a Tab Control in the form, and in one of the tabs I have a
subform
(sfmSiblings) in which I wish to list all the brothers and sisters
of
the
person currently being displayed in the main form. The basis of
the
selection is all records which have the same father ID or mother
ID
field
values (excluding of course the person displayed in the main
form).
I
am
trying to use the values in the controls on the main form where
the
father
ID and mother ID are displayed in the subform query.

I created the subform originally as a form with a query in which I
hardcoded
test values for the father ID and mother ID. This works fine.
Then
I
added
this form as a subform in the Tab Control of the main form. I
viewed
the
SQL for the query and updated it by substituting the values of the
controls
on the main form for the hardcoding. That is, instead of using
the
following format in the SELECT statement:

WHERE Person.IDFather = 5 OR Person.IDMother = 6 ...

I substituted:

WHERE Person.IDFather = frmMainForm!IDFath OR Person.IDMother
=
frmMainForm!IDMoth ...

I obviously have this syntax wrong, because when I run the main
form,
for
each record I get msgboxes prompting for the values
frmMainForm!IDFath
and
frmMainForm!IDMoth. If I respond with the correct values, the
subform
displays the correct data.

I hope that this makes some sense. Essentially my question is:
how
can
I
make the query in the subform use criteria displayed in controls
on
the
main
form?

Another aspect of this is that all the books and tutorials I have
seen
assume that the subform will be used to display data from a
different
but
related table from the record in the main form. In my case, there
is
only
one table and I want to display related records (via the parent
IDs)
from
that same table. Am I not allowed to do this? Or will I need
some
sort
of
additional crossreference table?

Thanks in advance for any assistance.
--
Cheers,
Lyn.

Thanks again, Allen. This has given me some good debugging tools.

I did as you suggested, all steps, but without any improvement.

However, I did discover the main problem. Rather than continually update
the same subform and same query, I had created new versions of each. In the
end I had about eight versions of the subform and a similar number of
queries. Updating the query version of a form or subform is easy -- you
just update the Record Source property. But I could not find any analogue
of this for updating the subform version in the Form properties. I
suspected that I might have had the wrong subform version configured in the
main form. The only way I could find to fix this was to delete the current
subform and to recreate it from the Toolbox so that I could get into the
Subform Wizard. Is there any other way to invoke the Subform Wizard?

Anyway, after deleting and recreating the subform in the tab control page of
the main form, the error went away.

I now get data in the subform, but it is always only the same (single)
Person record as in the main form. That is, if I have a number of brothers
and sisters, all with the same IDFather, only my own record is displayed in
the subform. Which I eventually want to suppress, leaving only brothers and
sisters. It seems that instead of the subforms Record Source being the
whole of the Person table, it is being restricted to the one record already
selected by the main form. I had expected the VBA effectively to create a
new recordset (I have successfully used such recordsets in this manner
elsewhere in the main form VBA). How can I make the VBA for the subform
create a new Record Source based on the WHOLE of the Person table, rather
than the single record already selected by the main form?

I feel that I am getting closer to the solution, there is just one piece of
the puzzle still missing.

--
Cheers,
Lyn.

"Allen Browne" wrote in message
. au...
Hi Lyn.

To debug this, ask Access to print mySQL out to the immediate window:
mySQL = "SELECT ...
Debug.Print mySQL
Me.[sfmSibs].Form...

Now try it. Open the Immediate window (Ctrl+G). Access will have printed
the
faulty SQL statement there. Copy it to clipboard. Then create a new query,
switch it to SQL View (View menu), and paste in the faulty SQL string.
This
should help you to see what's wrong, and you will see how to fix the
assigment to mySQL.

The pipe character is a place holder for the field name. It appears that
you
are getting the error message without the correct name being inserted into
the place holder. Ultimately it means that Access can't make sense of the
SQL statement. For example, if IDFather is actually a Text field (not a
Number field), then the SQL statement needs exta quote marks:
"WHERE Person.IDFather = """ & Me![IDFather] & """;"

Another cause of the error is Name AutoCorrect incorrectly tracking the
field name. Uncheck the boxes under Tools | Options | General | Name
AutoCorrect, and then compact the database (Tools | Database Utilities).

You're on the right track, so it is worth continuing to debug this. Do
include the trailing semicolon in the sql statement.

It would be possible to use the Change event of the tab control (not the
Click event of the page) rather than the Current event of the main form.
The
problem with that approach is that it leaves the wrong data showing in the
subform when you change record in the main form, until you move to a
different tab and move back to the one you want again.

--
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.

"Lyn" wrote in message
...
Allen,
I have tried your suggestion and variations of it, but no luck. After a
lot
of trial and error, I have resorted to using VBA code similar to what
you
provided in your previous. I have simplified the requirements to the
bare
minimum, just to get something that works, then I can build it up again.

I now have a form containing a subform (sfmSibs) in a tab control. I
have
removed any query from the subform's Record Source.

In the Current event for the main form, which I already use to populate
some
unbound controls on the main form, I have added the following code:

Dim mySQL As String

If Not IsNull(Me![IDFather]) And Me![IDFather] 0 Then
mySQL = "SELECT Person.SurnameBirth, Person.FirstName, " & _
"Person.DOB, Person.Sex, " & _
"Person.IDPerson FROM Person " & _
"WHERE Person.IDFather = " & Me![IDFather] & ";"
Me.[sfmSibs].Form.RecordSource = mySQL
End If

When I run this, if Me![IDFather] is null or zero, of course it works
(blank
form as expected). However, any record with a non-zero Me![IDFather]
gives
this error:

Run-time error '2465':
Microsoft Office Access can't find the field "|"
referred to in your expression.

Not very helpful, as I don't have "|" anywhere in the expression. (Once
when I mistyped a word, this error message displayed the word in error,
but
not this time.)

When I click Debug, the following line is highlighted:

Me.[sfmSibs].Form.RecordSource = mySQL

I presume that the problem is somewhere in the mySQL string. I have
tried
it with and without the terminating semicolon ";" (VBA often seems to
insert
that for you), but no effect.

Any ideas how to troubleshoot this when the field in error is quoted as
"|"
?!?!

A related question: instead of doing this in the Current event of the
main
form, could I do it in the On Click event of the tab control Page? So
that
the subform is not populated unless the relevant tab is clicked. Just
trying to learn as much as I can from this.

Thanks again for your help.

--
Cheers,
Lyn.