I am using a form to define parameters

[Guest]

I am using a form to select parameters. I have fields such as [project Nbr]
and [County]. There may be many projects in a county. I would like to be
able to leave the [Project Nbr] null and have the query return all of the
projects in the county.

I am thinking of using a IIf [Project Nbr] is null and have the query ignore
it or make the selection critera "True". What should I put in the selection
critera of the [Project Nbr] field on the query?

I truly appreciate your help.

 

[Douglas J. Steele]

You want your WHERE clause to be somethin like:

WHERE ([project Nbr] = Forms!MyForm!MyControl Or Forms!MyForm!MyControl IS
NULL)

You can do this by putting

Forms!MyForm!MyControl Or Forms!MyForm!MyControl IS NULL

as the criteria in the query builder.

 

[Guest]

Thanks, Doug. Is Doug ok?

I'll give this a try. As I understand the text as shown below (with proper
names) should be placed in the query critera. Regarding the "or", should
this text be typed in a single critera space or should the parts appear on
two seperate critera spaces?

I'll try both. Thanks again for your help.

You want your WHERE clause to be somethin like:

WHERE ([project Nbr] = Forms!MyForm!MyControl Or Forms!MyForm!MyControl IS
NULL)

You can do this by putting

Forms!MyForm!MyControl Or Forms!MyForm!MyControl IS NULL

as the criteria in the query builder.

--
Doug Steele, Microsoft Access MVP

(no private e-mails, please)

I am using a form to select parameters. I have fields such as [project
Nbr]
and [County]. There may be many projects in a county. I would like to be
able to leave the [Project Nbr] null and have the query return all of the
projects in the county.

I am thinking of using a IIf [Project Nbr] is null and have the query
ignore
it or make the selection critera "True". What should I put in the
selection
critera of the [Project Nbr] field on the query?

I truly appreciate your help.

 

[Guest]

Two lines worked fine.

Thank you