Sorgunun SQL'ini;

SELECT Query1.md, Query1.kn, Query1.rv, Sum(Table1.miktar) AS SumOfmiktar

FROM Query1 RIGHT JOIN Table1 ON (Query1.md = Table1.md) AND (Query1.kn = Table1.kn) AND (Query1.rv = Table1.rv)

GROUP BY Query1.md, Query1.kn, Query1.rv;

olarak değiştirin.