aggregate query processing definition

Efficient OLAP Query Processing in Distributed Data Warehouses

queries, e.g., correlated aggregate queries and data cubes. Current day ... We develop and define optimization strategies for distributed OLAP that can.

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Containment of Aggregate Queries∗

aggregate-query containment and equivalence prob- lems. ... The process of translat- ing such queries ... variables in A define the conditions appearing in the.

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A survey of top-k query processing techniques in relational database ...

ding rank-awareness in query processing techniques provides a more efficient and scalable solution. .... We formally define these query models in the .... An example top-k aggregate query is to find the best five areas to advertise student.

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Aggregate function - Wikipedia, the free encyclopedia

In database management an aggregate function is a function where the values of multiple rows ... Group by (SQL), SQL clause; Online analytical processing · OLAP cube · Fold (higher-ord...

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Similarity-Aware Query Processing and Optimization - Purdue e-Pubs

We present a generic definition of the SGB operator and three instances to support: (1) the ... satisfy to be used to answer a similarity aggregation query. 4.

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Query Processing Techniques in the . Summary-Table-by-Example ...

In this paper we discuss the query processing techniques used in. STBE. ... in STBE provides a natural way to specify aggregate functions and also solves ..... definition specifies ranges of values to the variable in the first position by giving.

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Range Aggregate Processing in Spatial Databases - Department of ...

Abstract—A range aggregate query returns summarized information about the points falling in a hyper-rectangle (e.g., the ... Aggregate processing of multidimensional objects has ..... all * are replaced by 4) meaning that it will not be modified.

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Aggregate-Query Processing in Data Warehousing Environments

Aggregate-Query Processing in Data Warehousing ... aggregate queries queries involving aggregation is be- .... The tree corresponding to the view definition.

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Query Processing for Sensor Networks - UW-Madison Database ...

centrating on in-network aggregation, interac- tion of in-network aggregation with the wire- less routing protocol, and distributed query processing.

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Query Reformulation Using Materialized Views in Data Warehouse ...

processing a given query is a difficult one attracting a significant. amount of research. ... views in answering a query with aggregation operations. We. extend the practical scope of .... intermediate result from V. We define these kinds of views as.

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Randomized Algorithms for Data Reconciliation in Wide Area ...

Area Aggregate Query Processing∗ ... This sort of query processing is quite different from trans- .... way to define Rec() is to take the average of the value to be.

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Babcock, B., Babu, S., Datar, M., Motwani, R ... - Computer Science

new requirements and challenges in query processing, and algorithmic issues. ... The meaning and implementation of blocking operators (e.g., aggregation and...

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Semantics and Evaluation Techniques for Window Aggregates in ...

unnecessarily confuse window definition with physical stream ... than existing window aggregate query evaluation options that ... process window queries.

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WOLAP: Wavelet-Based Range Aggregate Query Processing

WOLAP, for efficient polynomial aggregate query processing. We further enhance .... Then, we define the polynomial range aggregate query and show how.

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Top-K Aggregation Queries Over Large Networks - UCSB Computer ...

Definition 2 (Neighborhood Aggregate): Given a network. G and a relevance ... process aggregation queries over networks is often costly. For. 2-hop queries, it...

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TinyDB: An Acquisitional Query Processing System for Sensor ...

query processor (e.g.,the ability to select, join, project, and aggregate data), but, ..... To determine their own level, nodes pick a parent node that is (by definition).

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Partial Aggregation – Craig Freedman's SQL Server Blog

Jan 18, 2008 ... A discussion of query processing, query execution, and query plans in ... Partial aggregation is a technique that SQL Server uses to optimize...

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Advanced Database Aggregation Query Processing - CiteSeerX

Processing. Donghui ... The aggregation query is an important but costly operation ... Definition 1. range-temporal aggregation (RTA): given a set of temporal.

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Query Processing in Sensor Networks

A smart sensor query-processing architecture using database technology can facilitate deployment of ..... a parent node that is (by definition) one level closer to the root .... floor. Figure 3. Sensor network executing a simple aggregate query.

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Probabilistic Threshold Range Aggregate Query Processing over ...

A range aggregate query (RA query) on certain data returns summarized information about ... We formally define P T RA query over uncertain objects. – A novel...

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