Comparing the month and year elements of two date fields

[ChasK]

I am trying to create a formula that compares the month and year (eg. Dec 2009) from two date fields. If the the two date fields contain the same month and year the formula will print the invoice amount.
Any suggestions?
Thank you in advance.

 

[lbass]

if date(year({table.date1}),month({table.date1}),1) =
date(year({table.date2}),month({table.date2}),1) then
{table.invoiceamt}

-LB

 

[ChasK]

Thanks lbass. The formula worked perfectly. Thanks again.