SQL Statement To Generate Customer List Whose Last Payment Date Is Jan 04

Hi all,


I have a problem trying to generate the u/m list of customer.
I am trying to generate a list of customer whoes last commence date is
jan 04 to current.

It is part of a billing system which the customer come in and pay for
their season parking in carpark. They can pay for various period
shortest being 1 week.

so i will have customer paying for 1 week, 1 month, 2 months or even 1
year. Everytime a customer come in to pay, a new line at the incvoice
will be generated.

My DB structure is as followed

Customer Table
-Cust_Acc_No ----> (Primary Key)
-Customer Name
-Customer Address

Invoice
Cust_acc_no-- Link to customer table
Invoice_no -- primary key

invoice details
invoice_no -- link to invoice table
commence_date
expiry_date
amount_paid


if i do a

select * from customer a, invoice b, invoice_details c
where a.cust_acc_no=b.cust_acc_no and
b.invoice_no=c.invoice_no and
c.commence_date>1/1/04

it doesnt works as it will show

john, 1/1/04 - 31/1/04
john, 1/2/04 - 29/1/04


i do not want repetitive customer number just the latest commence
date.


can anyone help?

thanks