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Overview of Online Analytical Processing OLAP - Know More

Online Analytical Processing OLAP databases facilitate business-intelligence queri OLAP is a database technology that has been optimized for querying and reporting, instead of processing transactions The source data for OLAP is Online Transactional Processing OLTP databases that are commonly stored in data warehous...

Answering Approximate Range Aggregate Queries on OLAP , - Know More

Request PDF Answering Approximate Range Aggregate Queries on OLAP Data Cubes with Probabilistic Guarantees Approximate range aggregate queries ,...

Approximate Query Processing Using Wavelets - Know More

the scope of earlier work on approximate query answers, establishing the viability and effectiveness of wavelets as a generic approximate query processing tool for modern, high-dimensional DSS applications More specifically , we propose a novel approach to general-purposeapprox-imate query processing that consists of two basic steps...

Compressed Data Cubes for OLAP Aggregate Query , - Know More

Queries over more than one target measure or using different aggregate functions, along with the aggregation function of interest, is fixed for each cube Queries over more than one target measure or using different aggregation functions, would require pre-computing larger data cub...

Compressed Data Cubes for OLAP Aggregate Query , - Know More

OLAP, data cubes, clustering, density estimation, approximate query answering, data mining 1 INTRODUCTION There has been much work on answering multi-dimensional aggregate queries efficiently, for example the data cube operator 13 OLAP systems perform queries fast by pre-computing all or part of the data cube 15...

Approximate Computation of Multidimensional Aggregates of , - Know More

Computing multidimensional aggregates in high dimensions is a performance bottleneck for many OLAP applications Obtaining the exact answer to an aggregation query can be prohibitively expensive in terms of time and/or storage space in a data warehouse environment It is advantageous to have fast, approximate answers to OLAP aggregation queri...

A Robust, Optimization - Know More

A Robust, Optimization-Based Approach for Approximate Answering of Aggregate Queries , decision support applications such as On Line Analytical Processing OLAP and data mining for analyzing , so that approximate query processing using the sample is effective...

Compressed data cubes for OLAP aggregate query , - Know More

Compressed data cubes for OLAP aggregate query approximation on continuous dimensions Full Text PDF Get this Article , Ezio Lefons , Filippo Tangorra, Accuracy estimation in approximate query processing, Proceedings of the 14th WSEAS international conference on Computers part of the 14th WSEAS CSCC multiconference, p452-458, July 23-25 ....

Approximate Query Processing using Deep Generative Models - Know More

and natural language processing Furthermore, the task of generating approximate estimates for an aggregate query is quite di erent from common DL tasks such as classi ca-tion or regression However, a rigorous investigation shows that AQP using DL models is not only feasible but can be achieved in an e ective and e cient manner...

aggregate query processing - Know More

Aggregate-Query Processing in Data Warehousing , CiteSeerX - Document Details Isaac Councill, Lee Giles, Pradeep Teregowda In this paper we introduce generalized projections GPs , an extension of duplicate eliminating projections, that capture aggregations, groupbys, duplicate-eliminating projections distinct , and duplicate-preserving projections in a common unified framework....

Approximate query processing using wavelets - Know More

has spurred a flurry of research activity on approximate query processing techniques in recent years 1,7,9,11,12,16,26,33, 34 The majority of the proposed techniques, however, have been somewhat limited in their query processing scope , typi-cally focusing on specific forms of aggregate queries ,...

Accuracy Vs Lifetime Linear Sketches for Approximate , - Know More

approach that is inspired by OnLine Analytical Processing OLAP and query processing over streams The idea is to maintain and update a small space summary data structure in one pass over the data or as data appear in the stream The summary data structure is thenusedto directly answer queries quickly in an approximate manner The constraints...

Dynamic Sample Selection for Approximate Query , - Know More

The area of approximate answering of aggregate queries has been the subject of extensive research Hellerstein et al 22, 26 describe techniques for online aggregation in which approximate answers for queries are produced during early stages of query processing and gradually refined until all the data has been processed The online ....

Models and Techniques for Approximate Queries in OLAP , - Know More

Models and Techniques for Approximate Queries in OLAP 104018/978-1-60566-026-4ch425 Since the size of the underlying data warehouse server DWS is usually very large, response time needed for computing queries is the main issue in decision...

Efficient Approximate OLAP Querying Over Time Series - Know More

decision making As OLAP queries play a major role in these domains, it is desirable to also execute them on time series data While this is not a problem on the conceptual level, it can become a bottleneck with regards to query run-time In general, processing OLAP queries gets more computationally intensive as the volume of data grows...

Providing Probabilistically - Know More

A novel framework for providing probabilistically-bounded approximate answers to non-holistic aggregate range queries in OLAP is presented in this paper Such a framework allows us to efficiently support OLAP applications, as answering queries is the main bottleneck for this kind of applications To this end, scalability of the techniques and ....

A Robust, Optimization - Know More

A Robust, Optimization-Based Approach for Approximate Answering of Aggregate Queri Written By SurajitChaudhuri , Gautam Das , VivekMarasayya Microsoft Research, Washington , OLAP - Online analytical processing is an approach to quickly answer multi-dimensional analytical queries using OLAP ,...

definition of aggregate query processing - Know More

Aggregate-Query Processing in Data Warehousing Environments view definitionFigure 3 is obtained Using our algorithm for an- swering aggregate queries using materialized aggregate views see Section 5 , we can now ....

Accuracy Vs Lifetime Linear Sketches for Appoximate , - Know More

Accuracy Vs Lifetime Linear Sketches for Appoximate Aggregate Range Queries in Sensor Networks1,2 Konstantinos Kalpakis, Vasundhara Puttagunta and Parag Namjoshi Abstract Query processing in sensor networks is critical for several sensor based monitoring applications and poses several challenging research problems...

A Probabilistic Model for Data Cube Compression and Query , - Know More

Databases and data warehouses contain an overwhelming volume of information that users must wade through in order to extract valuable and actionable knowledge to support the decision-making process This contribution addresses the problem of automatically analyzing large multidimensional tables to get a concise representation of data, identify patterns and provide approximate answers to queri...

aggregate query processing - Know More

aggregate query processing definition aggregate query processing definition, optimizing aggregate queries in cache request regionbased query processing in sensor networks the processing of grouped aggregate queri however, since a region in our approach is defined as a inside a circle having a diameter d by definition 1...

Online analytical processing OLAP Microsoft Docs - Know More

Online analytical processing OLAP 02/12/2018 8 minutes to read 1 In this article Online analytical processing OLAP is a technology that organizes large business databases and supports complex analysis It can be used to perform complex analytical queries without negatively affecting transactional systems...

Approximate Query Processing in Decision Support System , - Know More

Key-Words - Aggregate queries, Approximate query answering, Data warehouses, Multidimensional data distribution, OLAP applications 1 Introduction Approximate query processing is an investigation area of increasing interest Classically, the database community was interested in the description of data...

4 Querying Dimensional Objects Using SQL - Know More

4 Querying Dimensional Objects Using SQL You can query the rich data stored in dimensional objects using SQL This chapter explains the basics of querying relational views of cubes and dimensions This chapter includes the following topics Querying Dimensional Data in SQL Exploring the Shape of OLAP Views Creating Basic Queries...

BI OLAP Flashcards Quizlet - Know More

Start studying BI OLAP Learn vocabulary, terms, and more with flashcards, games, and other study tools Search Create , The most widely used query language for MD databases is multidimensional expressions , Hybrid online analytical processing...

aggregate query processing in data warehousing - Know More

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 , Keywords approximate query processing, OLAP, data warehouse, , is unnecessary to have exact answers to aggregate queries if this, Data Warehousing and On-line Analytical ....

OLAP Flashcards Quizlet - Know More

Start studying OLAP Learn vocabulary, terms, and more with flashcards, games, and other study tools Search Create , Databases use multiple data warehouses to perform analytical processing c Data warehouses use multiple databases to perform analytical processing , in order to aggregate data going from more detailed to less detailed ....

Models and Techniques for Approximate Queries in OLAP - Know More

answers to aggregate queries has become a tight requirement Business analysis is the main application ield in the context to make DSS-based applications eficient, and, thus, has been of DSS, as well as OLAP queries being the most useful ones addressed in research in the vest of the so-called approximate in fact, these queries allow us to ....

Bounded Approximate Query Processing - Know More

Bounded Approximate Query Processing Abstract OLAP is a core functionality in database systems and the performance is crucial to enable on-time decisions However, OLAP queries are rather time consuming, especially on large datasets, and traditional exact solutions usually cannot meet the high-performance requirement...

REGULAR PAPER Jian Pei Ke Wang Answering ad hoc , - Know More

processing OLAP Aggregate query M Cho , various aggregate queries OLAP queries can be answered online In general, the complete set of aggregate cells on a multidimensional base table can be huge For example, if a base table has 20 dimensions and the cardinality of , Approximate answers usually provide sufficiently good insights ....