>I'm not sure I understand. What are the c1 and c2 values for in your example? Also can the first select statement in each example be modified to include donor name and address information?

You can assign an alias to a table in a query. It can be done for readability and has to be done if you want to use the same table more than once in the query. The table with alias assigned can be referenced in the query by alias only.

SELECT * FROM Contributions c1 
              ^             ^
              |             table alias
              table name

To add a donor info JOIN the query to the Donors table

SELECT *
  FROM Contributions c1 
  JOIN Donors ON c1.cDonors_id = Donors.cId 
  WHERE NOT EXISTS (
              SELECT * FROM Contributions c2
                WHERE c2.cDonors_id = c1.cDonors_id 
                   AND c2.ContributionDate > c1.ContributionDate)