Do you want to load from a DB / file or state the values as INLINE table? If latter, I think the actually values are missing and you should use the QV functions in the actual load statement, like
year([Invoice Date]) as Year,
Month([Invoice Date]) as Month
Above you have mentioned the value in inline table.
You have to first make the entry in your inline table.
load * inline [
than you can use the resident of above table
year([Invoice Date]) as InvoiceYear,
Month([Invoice Date]) as Invoicemonth
drop table Invoice;
thanks and regards