18. The system of claim 13 , wherein the identified first queries comprise statements <t, b 1 > through <t, b m >, m being greater than 1, where t represents a set of one or more tuples, and b 1 through bm represent respective modification operations on the set of one or more tuples, and wherein the second query comprises statement <t, c>, where c represents an aggregation of b 1 through b m .
18. The system of claim 13 , wherein the identified first queries comprise statements <t, b 1 > through <t, b m >, m being greater than 1, where t represents a set of one or more tuples, and b 1 through bm represent respective modification operations on the set of one or more tuples, and wherein the second query comprises statement <t, c>, where c represents an aggregation of b 1 through b m . 20. The system of claim 18 , wherein c represents a multiplication of b 1 through b m .