Aggregate Query Processing

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AggregateQuery Processing in Data Warehousing

Aggregatequery Processing In Data Warehousing

Aggregate-Query Processing in Data Warehousing Environments Ashish Gupta Venky Harinarayan Dallan Quass IBM Almaden Research Center Abstract In this paper we introduce generalized pro- jections GPs, an extension of duplicate- eliminating projections, that capture aggre- gations, groupbys, duplicate-eliminating pro-

Optimizing Aggregate Query Processing in Cloud Data

Optimizing Aggregate Query Processing In Cloud Data

aggregate query processing algorithms focus on optimizing various query operations but give less importance to communication cost overhead Two-phase algorithm. However, in cloud architectures, the communi-cation cost overhead is an important factor in query processing. Thus, we consider communication overhead to improve the distributed query pro-

AggregateQuery Processing in Data Warehousing

Aggregatequery Processing In Data Warehousing

Aggregate-Query Processing in Data Warehousing Environments. Pages 358369. Previous Chapter Next Chapter. ABSTRACT. No abstract available. References CS94 Surajit Chaudhuri, Kyuseok Shim Including Group-By in Query Optimization. VLDB 1994 354-366. Google ...

Aggregate query processing in the presence of duplicates

Aggregate Query Processing In The Presence Of Duplicates

Mar 10, 2015 Aggregate query processing. In this section, we consider aggregate queries with the SQL-syntax presented in Section 1. 3.1. The LCA algorithm one-phase aggregation. A naive brute-force BF algorithm can be designed as follows. All sensor nodes take their readings periodically and keep these readings into their local tables.

SAMPLING BASED JOINAGGREGATE QUERY

Sampling Based Joinaggregate Query

Approximate aggregate query processing techniques presented in 1,2 provide approximate results to a simple non-join aggregate query as depicted in Query 1, for Big Data queries. Here, aggregate denotes the aggregate function such as Sum, Average, Variance, Standard Deviation etc. Additionally, individual selection predicates

Aggregate Query Processing on Incomplete Data

Aggregate Query Processing On Incomplete Data

Jul 19, 2018 In this paper, we propose to directly estimate the aggregate query result on incomplete data, rather than imputing the missing values. An interval estimation, composed of the upper and lower bound of aggregate query results among all possible interpretation of

Processing Complex Aggregate Queries over Data

Processing Complex Aggregate Queries Over Data

sults to user queries while looking at the relevant data items only once and in a xed order determined by the stream-arrival pattern. Two key parameters for query processing over continuous data-streams are 1 the amount of memory made available to the on-line algorithm, and 2 the per-item processing timerequired by the query processor.

Optimizing Performance of Aggregate Query Processing

Optimizing Performance Of Aggregate Query Processing

May 08, 2019 In this paper, we study the characteristics of aggregate query, a typical type of analytical query, and proposed an approximate query processing approach to optimize the execution of massive data based aggregate query with a histogram data structure. We implemented this approach into big data system Hive and compare it with Hive and AQP-enabled ...

Adhoc aggregate query processing algorithms based on

Adhoc Aggregate Query Processing Algorithms Based On

Secondly, different aggregate operations for query processing are presented based on different encoding schemes. Thirdly, cost analysis for different aggregate operations is presented. Finally, the effectiveness and efficiency of the proposed algorithms is showed by

java How to convert MongoDB aggregate query in Spring

Java How To Convert Mongodb Aggregate Query In Spring

5 hours ago 5 hours ago Browse other questions tagged java mongodb mongodb-query aggregation-framework spring-data-mongodb or ask your own question. The Overflow Blog Observability is key to the future of software and your DevOps career

Probabilistic Threshold Range Aggregate Query

Probabilistic Threshold Range Aggregate Query

3 Exact Query Processing In this section, we rstly present aU-tree which is modied based on U-tree by integrating aggregate information this is followed by the exact query processing algorithm based on aU-tree. 3.1 aU-tree Similar with the adjustment of aR-tree to R-tree for the RA query over certain

Aggregate data faster with approximate query processing

Aggregate Data Faster With Approximate Query Processing

May 22, 2019 May 22, 2019 Aggregate data faster with approximate query processing. ... The article includes an introduction to the approximate query processing concept, a definition of the available functions and their usage, and a generic test script to evaluate approximate query performance. 1. Introduction to approximate query processing

PDF Aggregate Query Processing using Random walk

Pdf Aggregate Query Processing Using Random Walk

Ganwani, 25 May, 2013 ISSN 2277-9655 IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES amp RESEARCH TECHNOLOGY Aggregate Query Processing using Random walk approach in Dynamic Environment Vinod S. Gangwani1, Prof. P. L. Ramteke2 1 Department of Computer Science amp Engineering H.V.P.Ms COET, SGBAU, Amravati MH, India 2 Department of

Robust and Efficient Aggregate Query Processing in

Robust And Efficient Aggregate Query Processing In

May 08, 2008 In general, aggregate queries can be classified into two categories, duplicate-insensitive and duplicate-sensitive. For duplicate-insensitive aggregations such as MIN and MAX, Silberstein presents a novel query processing algorithm called HAT with the goal of minimizing message traffic cost in a network while guaranteeing data accuracy. This ...

AggregateQuery Processing in Data Warehousing

Aggregatequery Processing In Data Warehousing

aggregate queries queries involving aggregation is be- coming increasingly important. Aggregate queries are frequent in decision support applications, where large

Optimizing Aggregate Query Processing in Cloud Data

Optimizing Aggregate Query Processing In Cloud Data

aggregate query processing algorithms focus on optimizing various query operations but give less importance to communication cost overhead Two-phase algorithm.

AggregateQuery Processing in Data Warehousing

Aggregatequery Processing In Data Warehousing

Aggregate-Query Processing in Data Warehousing Environments. Pages 358369. Previous Chapter Next Chapter. ABSTRACT. No abstract available. References CS94 Surajit