3 citations · 3 across the 2 of their papers we have counts for
4 papers · 1 filter
Equivalences Among Aggregate Queries with Negation
Sara Cohen, Werner Nutt, Yehoshua Sagiv
Query equivalence is investigated for disjunctive aggregate queries with negated subgoals, constants and comparisons. A full characterization of equivalence is given for the aggreg…
EquiX--A Search and Query Language for XML
Sara Cohen, Yaron Kanza, Yakov Kogan +3
EquiX is a search language for XML that combines the power of querying with the simplicity of searching. Requirements for such languages are discussed and it is shown that EquiX me…
EquiX---A Search and Query Language for XML
Sara Cohen, Yaron Kanza, Yakov Kogan +3
EquiX is a search language for XML that combines the power of querying with the simplicity of searching. Requirements for such languages are discussed and it is shown that EquiX me…
Algorithms for Rewriting Aggregate Queries Using Views
Sara Cohen, Werner Nutt, Alexander Serebrenik
Queries involving aggregation are typical in database applications. One of the main ideas to optimize the execution of an aggregate query is to reuse results of previously answered…