Results 11 to 20 of about 2,093,284 (296)
The $$\theta $$-Join as a Join with $$\theta $$ [PDF]
, 2020 We present an algebra for the classical database operators. Contrary to most approaches we use (inner) join and projection as the basic operators. Theta joins result by representing theta as a database table itself and defining theta-join as a join with that table. The same technique works for selection.
Desharnais, Jules, Möller, Bernhard
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Proceedings of the 2016 International Conference on Management of Data, 2016 Joins are expensive, and online aggregation over joins was proposed to mitigate the cost, which offers a nice and flexible tradeoff between query efficiency and accuracy in a continuous, online fashion. However, the state-of-the-art approach, in both internal and external memory, is based on ripple join, which is still very expensive and may also need ...
Feifei Li 0001 +3 more
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Faster joins, self-joins and multi-way joins using join indices
Data & Knowledge Engineering, 1998 This article was already published in ibed. 28, No. 3, 277-298 (1998).
Hui Lei 0001, Kenneth A. Ross
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Model-Driven Development of Web APIs to Access Integrated Tabular Open Data
IEEE Access, 2020 More and more governments around the world are publishing tabular open data, mainly in formats such as CSV or XLS(X). These datasets are mostly individually published, i.e.
Cesar Gonzalez-Mora +4 more
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Electronic Notes in Theoretical Computer Science, 2004 Committed Join (cJoin) is an extension of Join with high-level primitives for programming dynamic nested negotiations with compensations. In this paper we show that flat cJoin processes (i.e. processes without sub-negotiations) can be encoded in the ordinary Join calculus by exploiting a distributed two-phase commit protocol.
BRUNI, ROBERTO +2 more
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The VLDB Journal The International Journal on Very Large Data Bases, 1999 Two new algorithms, "Jive-join'" and "Slam-join," are proposed for computing the join of two relations using a join index. The algorithms are duals: Jive-join range-partitions input relation tuple-ids then processes each partition, while Slam-join forms ordered runs of input relation tuple-ids and then merges the results.
Li, Zhe, Ross, Kenneth A.
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On Noncommutative Joinings [PDF]
International Mathematics Research Notices, 2017 This paper extends the classical theory of joinings of measurable dynamical systems to the noncommutative setting from several interconnected points of view. Among these is a particularly fruitful identification of joinings with equivariant quantum channels between $W^{\ast}$-dynamical systems that provides noncommutative generalizations of many ...
Bannon, Jon P. +2 more
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On partial inverse operations in the class of preradicals of modules
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019 In the present work two partial operations in the class of preradicals ℙℝ of the category R-Mod of left R-modules are defined and investigated. They are inverse operations for product with respect to meet and coproduct with respect to join.
Jardan Ion
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On the edge chromatic vertex stability number of graphs
AKCE International Journal of Graphs and Combinatorics, 2023 For an arbitrary invariant [Formula: see text] of a graph G, the [Formula: see text]vertex stability number [Formula: see text] is the minimum number of vertices of G whose removal results in a graph [Formula: see text] with [Formula: see text] or with ...
Saeid Alikhani, Mohammad R. Piri
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Results on Laplacian spectra of graphs with pockets
AKCE International Journal of Graphs and Combinatorics, 2018 Let be simple connected graphs on and vertices, respectively. Let be a specified vertex of and . Then the graph obtained by taking one copy of and copies of and then attaching the th copy of to the vertex , , at the vertex of (identify with the vertex of
Sasmita Barik, Gopinath Sahoo
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