aggregate query processing in data warehousing

Aggregate-Query Processing in Data Warehousing ... - CiteSeerX

Aggregate-Query Processing in Data Warehousing. Environments. Ashish Gupta. Venky Harinarayan. Dallan Quass. IBM Almaden Research Center. Stanford...

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Aggregate-Query Processing in Data Warehousing Environments

We then illustrate the power of our approach by solving a very practical and important problem in data warehousing: how to answer an aggregate query on base...

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Efficient Processing of Data Warehousing Queries in a Split ...

Jun 16, 2011 ... query execution strategies for data warehouse queries in split execution environments, with particular focus on join and aggregation operations...

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Metadata for Approximate Query Answering Systems

Jun 23, 2012 ... In business intelligence systems, data warehouse metadata ... (a) to know which data are available for approximate query processing and (b) to define ... of materialized tables representing precomputed aggregate queries [8].

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Query optimization for cloud data warehouse

These join and aggregate operations require communication for transferring data ... Hence, it requires a robust data model and a distributed query-processing...

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SQL for Aggregation in Data Warehouses - Oracle

Aggregation is a fundamental part of data warehousing. To improve aggregation ... Quicker and more efficient query processing. Reduced client processing...

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Aggregate-based query processing in a parallel data warehouse ...

In the last years data warehousing has emerged as a fundamental database technology providing the basis for online analytical processing (OLAP). In general...

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Computing Data Cubes and Aggregate Query Processing

processing analytical query over data cubes stored in the proposed structure has been outlined. Key words: Data Warehouse, Data Cube, Cube Computation,...

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Red Brick Vistatm: Aggregate Computation and ... - Tableau Research

Aggregate query processing in large data ware- ... points in all dimensions is impractical in a large data ... tightly integrated in the Red Brick Warehouse server.

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Efficient OLAP Operations in Spatial Data Warehouses

several algorithms for spatial aggregation and we propose a method which .... of the paper we describe a data structure and associated query processing...

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Processing Complex Aggregate Queries over Data Streams Cornell

Jun 4, 2002 ... eral aggregate SQL queries over continuous data streams with limited mem- ... DBMS of a (perhaps, off-site) data warehouse, often making ac-.

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Approximate Query Processing - Intel University Research

Primarily for Aggregate queries; Goal is to quickly report the leading digits of answers ... The Aqua Architecture. Data. Warehouse. (e.g., Oracle). SQL. Query Q.

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Optimizing Aggregate Query Processing in Cloud Data Warehouses ...

In this paper, we study and optimize the aggregate query processing in a highly distributed Cloud Data Warehouse, where each database stores a subset of...

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A Survey on Parallel and Distributed Data Warehouses - go

that need to share their data in a coherent distributed data warehouse. ... data sets efficiently, in both query processing and other concerns such as loading ..... primitives are computed in each node, from which the final aggregation function is.

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Probabilistic Threshold Range Aggregate Query Processing over ...

A range aggregate query (RA query) on certain data returns summarized information about ... query processing techniques are presented in Section 3 and Section 4, respec- tively. In Section 5, the ..... data warehouses. In SSTD 2001. 14.

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Cost-Based Optimization of Aggregation Star Queries on ...

processing of aggregation star queries changes dramatically creating new ... faster response times for queries expressed on large data warehouses.

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Aggregate-Query Processing in Data Warehousing ... - VLDB

Feb 1, 1995 ... ... aggregate queries in a data warehousing environment, frequently used ... tables to help answer aggregate queries has not been realized.

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System Architecture for Approximate Query Processing - Canadian ...

May 2, 2016 ... Keywords: approximate query processing, OLAP, data warehouse, ... is unnecessary to have exact answers to aggregate queries if this...

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Improvement of Query Processing Speed in Data Warehousing with ...

Data warehousing is a huge collection of data sources meant for handling strategic ... In case of iceberg querying the main theme is aggregate query processing...

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Spatial Data warehouses

of spatial indexes, aggregation operations and SOLAP. In this paper ..... benchmarks used for spatial data warehouses query processing should fit spatial data.

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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. ... in the data warehousing environment because most of the queries. contain aggregation operations and materialized views are mostly. in the form of...

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Aggregate-based Query Processing in a Parallel Data Warehouse ...

approach to ad-hoc query processing usually takes unac- ceptably long. ... CQL. SQL. Aggregate-based Query Processing in a Parallel Data Warehouse Server.

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Efficient query processing framework for big data warehouse: an ...

Mar 11, 2015 ... to the post-processing phase, so that data warehouse queries. can be transformed ..... Aggregation, Merge, and Post-processing, which are the.

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Extended conditions for answering an aggregate query using ...

Extended conditions for answering an aggregate query using materialized views ... Aggregate-query processing in data warehousing environments. Proc.

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Containment of Aggregate Queries∗

sively in data warehousing, are based almost entirely ... aggregate-query containment and equivalence prob- lems. ...... query processing in data warehouses.

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Aggregate-Query Processing in Data Warehousing Environments

Aggregate-Query Processing in Data Warehousing. Environments. Ashish Gupta. Venky Harinarayan. Dallan Quass. IBM Almaden Research Center. Stanford...

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Aggregate-Query Processing in Data Warehousing Environments

Aggregate-Query Processing in Data Warehousing Environments, 1995 Article. Bibliometrics Data Bibliometrics. · Downloads (6 Weeks): n/a · Downloads (12...

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Sunnie S. Chung, College lecturer | Cleveland State University

Data Analytics and Big Data Processing in Massively Parallel Processing (MPP) ... System with Query Rewrite Rules in in MPP Parallel Data Warehouse (PDW) ... Querying Encrypted Databases - Part II: Processing Aggregate Queries, Sun...

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Cache-Based Aggregate Query Shipping - Journal of Computer ...

aggregate function in distributed query processing, a multi-level hybrid view caching (HVC) scheme is ... distributed data warehouse or database systems on In-.

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CubeCache: Efficient and Scalable Processing of OLAP ... - CERCS

particular, CubeCache can perform aggregation queries in parallel at different peer ... problem. Also related is Data Warehousing and OLAP query processing.

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An Overview of Data Warehousing and OLAP Technology - Microsoft

Data warehousing and on-line analytical processing (OLAP) are essential elements of ... for efficient query processing; and tools for metadata management and for ... aggregation or increasing detail) along one or more dimension hierarchies...

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Efficient OLAP Query Processing in Distributed Data Warehouses

queries, e.g., correlated aggregate queries and data cubes. Current day .... to distributed data warehouses and OLAP query processing in other application.

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Efficient OLAP query processing in distributed data warehouses

queries over a distributed data warehouse. We have .... and OLAP query processing in other application ... processing rather than distributed aggregate com-.

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Aggregate-Query Processing in Data Warehousing Environments ...

We then illustrate the power of our approach b y solving a very practical and important problem in data warehousing: how to answer an aggregate query on base...

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Designing and Using Views To Improve Performance of Aggregate ...

important classes of aggregate queries, including range-aggregate queries on ... Data warehouses, query language and query optimization, query processing,...

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Groupwise Processing of Relational Queries - Columbia University

data warehousing has come a demand for techniques to. evaluate and optimize very complex relational queries in-. volving both aggregation and joins. Current...

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Data Warehousing and On-line Analytical Processing - Jiawei Han

Data Warehouse: Basic Concepts; Data Warehouse Modeling: Data Cube and ... Warehouse—tuned for OLAP: complex OLAP queries, multidimensional view, ... data consolidation: DS requires consolidation (aggregation, summarization) of...

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