definition of aggregate query processing
Designing and Using Views To Improve Performance of
Sep 9 of queries and a database return definitions of derived data that when query language and query optimization query processing
Semantics and Evaluation Techniques for Window
intra operator buffering and tuple re processing In this paper we present a framework for defining window semantics and a window query evaluation technique
Query Processing over Uncertain Data Department of
An uncertain or probabilistic database is defined as a probability distribution All aspects of query processing over uncertain data and in particular its com queries 7 and aggregate queries 30 exhibit an interesting dichotomy property
Query Processing for Sensor Networks Cornell Computer
long term scientific research project that monitors an 3 Simple Aggregate Query Processing outline how to process such simple aggregate queri Query
Efficient Ranking and Aggregate Query Processing in
Uncertainty opens the gate to many possible definitions for ranking and aggregate queri This project systematically examines the underlying properti
Approximate Query Processing Springer
Definition Query processing in a database context is the process that deduces It is designed primarily for aggregate queries such as count sum and avg etc
Just In Time Analytics on Large File Systems Usenix
Fast processing of aggregate and top k queries are of ten needed by applications requirement is defined by two properties 1 file system analytics must be
Query Processing in Sensor Networks CiteSeerX
A smart sensor query processing architecture using database technology can facilitate deployment of table at well defined intervals specified as query parameters floor Figure 3 Sensor network executing a simple aggregate query
Using Object Awareness to Optimize Join Processing in
Mar 23 means to handle costly aggregate queries by applying in cremental performance of query processing using the aggregate cache
Query behavior IBM
Specify whether aggregate rollups are computed locally or in the database Improve performance by setting the query processing type to determine Select the vendor specific function sets for the data sources that are defined in the project
Aggregate function Wikipedia
In database management an aggregate function is a function where the values of multiple rows OLAP cube Online analytical processing Pivot table Relational algebra Utility functions on indivisible goods Aggregates of utility functions
Fast Evaluation of Iceberg Pattern Based Aggregate
which pattern based aggregate PBA queries on a sequence database are evaluated is a sequence of variables each is defined over a domain For ex ample housing and online analytical processing OLAP of archived se quence data
Aggregate Query Processing in Data Warehousing
Aggregate Query Processing in Data Warehousing aggregate queries queries involving aggregation is be The tree corresponding to the view definition
Knowing When You re Wrong Building Fast and Sameer
Keywords Approximate Query Processing Error Estimation Diagnostics 1 a means to return approximate answers and reduce query response tim A large body of query aggregates that are sometimes unrealistic and can produce
Online aggregation Wikipedia
Online aggregation is a technique for improving the interactive behavior of database systems processing expensive analytical queri Almost all database
metadata challenge for query processing over
operators such as selection projection union and aggregation Advanced research has been Section 1 includes query processing definition and related work
The Case for Online Aggregation University of
interfaces but also corresponding changes to database query processing for prototyping online aggregation because it supports arbitrary user defined
Aggregate Queries in Wireless Sensor Networks
Sep 26 Existing representative in network aggregate query processing techniques As in Figure 1 TAG establishes hierarchical routing by defining
Probabilistic Threshold Range Aggregate Query
A probabilistic threshold range aggregate PTRA query We formally define P T RA query over uncertain objects aR tree based Range Query Processing
Differential Forms for Target Tracking and Aggregate
Differential Forms for Target Tracking and Aggregate Queries in Distributed His research interests are in mobile computing sensor networks and algorithms
A Robust Optimization Based Approach for Approximate
these applications is that they execute aggregation queries on large databases approach to the problem of approximate query processing of SPJ queries with GROUP BY concept of fundamental regions that we discuss in Section 4 have
Aggregations Elasticsearch Reference 55 Elastic
By the end of the aggregation process we ll end up with a list of buckets For example if you define a set of aggregations under the range aggregation the
Supporting Ad hoc Ranking Aggregates Cheriton School
together guide the query processor toward a provably optimal tu ple schedule for user defined aggregate functions such as the mid sum in query Q2 above
Sketch Techniques for Approximate Query
Of all the methods for approximate query processing presented in this vol Any given sketch is defined for a particular set of queri Queries are an see how they can be applied to approximate the results of various aggregation queri
client/c/usage/aggregate Aerospike
There are various forms of processing results of a secondary index query Many developers use SQL for define aggregation queries against a database
Using User Defined Aggregate Functions Oracle Help
The process of creating a user defined aggregate function has two steps can be used just like built in aggregate functions in SQL DML and query statements
Rewriting Aggregate Queries using Description Logic
An aggregate query is a query that contains an aggregate function Aggregate 2 Definitions In this section we define a Description Logic called DLFDE and an object relational process is to combine the inherited constraints from EQ