Need this formula to look back 2 full years

Question

In the following code, we are looking to show all records, where, the part# had no sales for the 2 month period selected by the user. But we also do not want to show this part if the current onhand balance is o, and also, we do want to show when was the last sale for this part. THe change i need is that the code here will show the last sales for past year only of calender year. I would like it to show 2 years back, meaning 2 full years from current date. I think i need to have an OR statement here and {SUMPRT.IQYER#} = {?Year} but not really sure. this is a crystal reports formula.
{PARTINV.IEQOH#} <> 0.00 and ( if {?Month}=1 then (({SUMPRT.IQA01} =0 and {SUMPRT.IQYER#} = {?Year}) and ({SUMPRT.IQA12} =0 and {SUMPRT.IQYER#} = {?Year}-1)) else if {?Month}=2 then ({SUMPRT.IQA01} =0 and {SUMPRT.IQA02} =0 ) and {SUMPRT.IQYER#} = {?Year} else if {?Month}=3 then etc...

Answer 1

Hi Paul,
This formula is pretty confusing because I can't decipher which fields relate to what.  I think though you may be overthinking the formula.
It looks like you are evaluating each month of the year individually.  Instead of using nested IFs, have each month as a separate statement.  Better yet, use a case statement like:
{PARTINV.IEQOH#} <> 0.00 And
Select {?Month}
     Case 1:     (({SUMPRT.IQA01} =0 and {SUMPRT.IQYER#} = {?Year})
                    and ({SUMPRT.IQA12} =0 and {SUMPRT.IQYER#} = {?Year}-1))
     Case 2:     ({SUMPRT.IQA01} =0 and {SUMPRT.IQA02} =0 )
                    and {SUMPRT.IQYER#} = {?Year}
     Default:     etc...;
Separating the months into a Case or independant IF should get you your results.
Thanks,
Brian