SELECT F1.docid as docid1,
            F2.docid as docid2,
            SUM(F1.count * F2.count) as similarity
    FROM Frequency as F1, Frequency as F2
    WHERE F1.term = F2.term AND
          F1.docid = '10080_txt_crude' AND
          F2.docid = '17035_txt_earn'
   GROUP BY F1.docid, F2.docid