>>I have two tables - we'll call them Customer and Bill. A customer can have zero or many bills, and it is linked by the CustomerID. What I want to do is pull a customer by CustomerID and also pull their last bill only if it is within 30 days old. If there isn't a bill that fits that criteria, I want null value.
>>
>>Can I do this with a JOIN? Anybody have any advice on how to do the filtering in the JOIN statement?
>
>Try
>

>SELECT *
>	FROM Customer c
>		LEFT JOIN (SELECT TOP 1 FROM Bill b
> 			WHERE CustomerID = @CustomerID AND BillDate > ...
>                              ORDER BY BillDate DESC) bd on bd.CustomerID = c.CustomerID
>	WHERE c.CustomerID = @CustomerID
>

You're the man, Sergey.

(I haven't tried it yet, but if you say it will work I'm sure it will ;-))