Change Form/Report Query Based on User Selection

[Wayne]

I have a form and report based on a query. I need to change the query
based on what the user selects on a form. Using VBA in MS Access
2002, can I change a single field in an existing query from GROUP BY
to LAST? This process would be initiated by a click event on a form.
Thanks in advance for any help.

 

[John Spencer]

I would say only if you are willing to construct the entire query string in
VBA and then apply that string as the source of the report.

John Spencer
Access MVP 2002-2005, 2007-2009
The Hilltop Institute
University of Maryland Baltimore County

 

[Wayne]

I would say only if you are willing to construct the entire query string in
VBA and then apply that string as the source of the report.

John Spencer
Access MVP 2002-2005, 2007-2009
The Hilltop Institute
University of Maryland Baltimore County




- Show quoted text -

Thanks. Putting the SQL into a string seems to be the best way to do
it but now I have a new problem.

When I change the query GROUP BY field to LAST in VBA the Control
Source name changes from ServiceFrom to LastOfServiceFrom. On the
form I have tried many ways to display both fields like:

=IIf(IsError([LastOfServiceFrom]), [ServiceFrom],[LastOfServiceFrom])
This displays the [LastOfServiceFrom] correctly but gives an #ERROR
when the query is changed to the [ServiceFrom] field.

=IIf(IsError([ServiceFrom]),[LastOfServiceFrom],[ServiceFrom])
This displays the same as the above???? I thought it would be the
opposite but it’s not. Only the [LastOfServiceFrom] displays
correctly. Weird.

How can I get both field names to display correctly in my form when
the Record Source query is changed?

 

[John Spencer]

You could alias the name in the query you are building so the name is consistent.

SELECT Last(ServiceFrom) as ServiceStart
FROM SomeTable

SELECT ServiceFrom as ServiceStart
FROM SomeTable
GROUP BY ServiceFrom

There are other ways, but they tend to cause parameter prompts to occur.

John Spencer
Access MVP 2002-2005, 2007-2009
The Hilltop Institute
University of Maryland Baltimore County

I would say only if you are willing to construct the entire query string in
VBA and then apply that string as the source of the report.

John Spencer
Access MVP 2002-2005, 2007-2009
The Hilltop Institute
University of Maryland Baltimore County



- Show quoted text -

Thanks. Putting the SQL into a string seems to be the best way to do
it but now I have a new problem.

When I change the query GROUP BY field to LAST in VBA the Control
Source name changes from ServiceFrom to LastOfServiceFrom. On the
form I have tried many ways to display both fields like:

=IIf(IsError([LastOfServiceFrom]), [ServiceFrom],[LastOfServiceFrom])
This displays the [LastOfServiceFrom] correctly but gives an #ERROR
when the query is changed to the [ServiceFrom] field.

=IIf(IsError([ServiceFrom]),[LastOfServiceFrom],[ServiceFrom])
This displays the same as the above???? I thought it would be the
opposite but it’s not. Only the [LastOfServiceFrom] displays
correctly. Weird.

How can I get both field names to display correctly in my form when
the Record Source query is changed?