How do I pull information from one month before the current date in MS Access using SQL?

I am using MS Access 2007 and trying to write this query using SQL and do not know how to pull the current date or subtract a month to it.

SELECT SalesNo.SaleNo, SalesNo.CustID, SalesNo.SaleDate
FROM SalesNo
WHERE ??? current date - one month ???
ORDER BY SalesNo.SaleDate;

Select allOpen in new window