Question

I am having a problem setting up my date boundaries for the query.

I want records between 10/1/2010 and 12/31/2010, but without a record (activity) in calendar year 2011 to date.

where INV.Date_Imported BETWEEN '10/1/2010' AND '12/31/2010'
    AND INV.RecID NOT IN (
        SELECT RecID 
        FROM [VW_Invoice_All] 
        WHERE Date_Imported > '1/1/2011' 
    ) 

Answer 1

The only glaring issues I see is your Date_Imported line. If you want 1/1/2011 to be included in the NOT IN query, you need to change the query to

WHERE Date_Imported >= '1/1/2011'

BETWEEN is already inclusive, which is what you appear to be going for.