… queries … non-aggregate queries, interest in aggregate queries has been motivated recently
by the rapid expansion of data warehousing and decision support, where aggregate queries …

… only considcr aggregate queries which have a single aggrcgation tcrrn. In many cases, it is
possible to reduce the query equivalence problem for qucrics with several aggregate terms to …

… In particular, we show that containment is decidable for queries with arbitrary nesting of
aggregation with uninterpreted aggregate functions as long as we do not perform joins or …

… how to reduce containment of aggregate queries to equivalence of aggregate queries. This
… In Chapter 7, we show how to reduce containment of aggregate queries to equivalence of …

… of the query-containment problem for conjunctive queries … , the query-containment problem
for conjunctive queries with … , the query-containment problem for conjunctive queries with …

… a generalization of conjunctive queries, in which relations … tn this paper we study conjunctive
queries over databases in … decidability of conjunctive query containment for different label …

… We define containment of queries on K-relations in terms of the natural order in Section 4
and … We define containment of K-relations and queries over Kinstances in terms of the natural …

… on query containment. For the case where q does not contain regular expressions, we provide
a method for deciding query containment… result on containment of conjunctive queries with …

… that have arbitrary terms in their head, although the aggregate queries for which we
investigate containment have only head variables. The reason is that we will have to consider …

… We consider the problem of query containment over an object … containment problem for
F-logic queries can help with query … inheritance, negation, and aggregates. Another area where …