I have involved in a similar topic recently. Check the sample download
provided by Doug in this discussion:

http://tinyurl.com/aa24k

--
HTH
Van T. Dinh
MVP (Access)


"Jason V" wrote in message
...
I have been stuck on this for some time now. I will try to make it as
clear
as I can.

I need to create a Report of "transactions" (days worked of various
employees) that have been assigned a specific invoice number. These
reports
need to include calculated "amounts" (hours worked x rate).

Different employees have different rates and the rates will change over
time, the rates are always assigned an "effective date". The rate that is
used to calculate the "amount" must use the rate that was effective on the
date that the transaction occurred.

I query all transactions (from the transaction table) to find those with
the
specified Invoice Number(the transaction table includes date, employee,
hours
worked, etc.). Now I need to assign a rate (from the rate table) to each
transaction based on the date the transaction occurred. Access must look
at
the employee, then choose the largest "effective date" which is less than
the
transaction date. Lastly, I need to perform the "amount" calc.

Can I set up a single query to do all of this? I know I can do it if each
employee only has a single rate (in the rate table). I just don't know
how
to include the criteria to choose the correct effective date.

Let me know if more information is needed..thanks in advance.