In Access VBA expression builder, how do I sum a column conditionally?

Question

Let's say I have two fields A and B and one textbox B_input. I would like to set up a query so it sums all entries of column A where B = B_input

Currently I have:

==Sum(IIf([B_input]<>"All",[A],IIf([B_input]<>[B],0,[A])))

I did more testing, it seem the problem is that under Sum(IIF([B_input])), it's not recognizing the value of [B_input], but if I just have IIF([B_input]), it recognize the value just fine, any ideas?

Answer 1

Gave up, went with form filtering instead.

Answer 2

iif([B_input]=="xyz",Sum[A],False)

Might be what you're after but I'm not sure i understood your question properly.

Alternatively, just edit the sql to something like

SELECT(SUM[A]) AS SumOfA FROM [MyTable] HAVING ("B"="xyz");

Answer 3

How about:

=Sum(IIf([B_input]<>"All",[A],0))