Combining where and IIF statements in Access

Question

I have a form with three buttons relating to three yes/no variables that are not mutually exclusive in a subform. By default Access sets up the relationship using "and" so if I select two of the three buttons it shows me all the observations that have "yes" for both, but I want the buttons to have an "or" relationship so that if I select two buttons I want all the observations where it says yes to either of the two checked variables.

I'm trying to write a query that will do this, but Access doesn't support SQL case function and I can't get it to work with the IIF statement.

I want to code something along the lines of:

select var1,var2,var3 
from table 
where iif(form!form1!var1=yes and form!form1!var2=no and form!form1!var3=yes,table.var1=yes or table.var3=yes and table.var2=no,...)

It seems you can only use iif in certain places. Any ideas how to do this?

Answer 1

The SQL shown below will return the proper rows if the following steps are taken:

SELECT Table1.Var1, Table1.Var2, Table1.Var3, Table1.ID
FROM Table1
WHERE ((([Forms]![frmChildTable]![bVar1] And [var1])=True)) 
    OR ((([Forms]![frmChildTable]![bVar2] And [var2])=True)) 
    OR ((([Forms]![frmChildTable]![bVar3] And [var3])=True));

• Create 3 textboxes on the form named bVar1, bVar2, bVar3
• Set the format to Yes/No
• Have your existing three buttons toggle the controls

I assume your use of the word 'button' meant 'Command Button'. If you wanted to use 'Option Buttons', then no code necessary to toggle.