Results 1 to 10 of about 33,955 (265)
A technique for parallel query optimization using MapReduce framework and a semantic-based clustering method. [PDF]
PeerJ Comput Sci, 2021 Query optimization is the process of identifying the best Query Execution Plan (QEP). The query optimizer produces a close to optimal QEP for the given queries based on the minimum resource usage.
Azhir E +4 more
europepmc +3 more sources
Query Optimization for Distributed Spatio-Temporal Sensing Data Processing. [PDF]
Sensors (Basel), 2022 The unprecedented development of Internet of Things (IoT) technology produces humongous amounts of spatio-temporal sensing data with various geometry types.
Li X, Yu H, Yuan L, Qin X.
europepmc +2 more sources
Graph Query Processing Technology Based on Data Warehouse [PDF]
Jisuanji gongcheng, 2023 The maturity of technologies such as vectorization provides an opportunity to realize graph queries based on a data warehouse.However, the existing system does not consider the characteristics of columnar storage and queries and fails to efficiently ...
Jiading GUO, Peng WANG
doaj +1 more source
Twig Query Optimization Based on Partial Evaluation [PDF]
Jisuanji gongcheng, 2016 TreeMatch algorithm is widely considered to be an effective Twig query algorithm.According to the disadvantage of TreeMatch algorithm’s repeated analysis on Twig pattern,partial evaluation technology in the field of compilation is applied,and a Twig ...
GAO Wanchen,LIAO Husheng,SU Hang
doaj +1 more source
Optimization of correlate subquery based on distributed database
Xibei Gongye Daxue Xuebao, 2021 Subquery is widely used in database. It can be divided into related subquery and non-related subquery according to whether it is dependent on the table of the parent query.
doaj +1 more source
Query Refinement into Information Retrieval Systems: An Overview
Journal of Information and Organizational Sciences, 2023 Query, expressing the user need and requirement, has an important role, in an information retrieval system, for reaching a high accuracy search. In this paper, we present an overview of the different refinement operations that the query may undergo, in ...
Mawloud Mosbah
doaj +1 more source
Evolutionary Algorithms for Query Op-timization in Distributed Database Sys-tems: A review
Advances in Distributed Computing and Artificial Intelligence Journal, 2018 Evolutionary Algorithms are bio-inspired optimization problem-solving approaches that exploit principles of biological evolution. , such as natural selection and genetic inheritance.
Zulfiqar ALI +2 more
doaj +1 more source
Query Optimization Algorithm Based on Learning to Rank [PDF]
Jisuanji kexueQuery optimization is a key aspect of relational databases.In the traditional query optimization process,cardinality estimation of join and filter operations in a query is usually required in order to obtain a better execution plan.However,due to the ...
YU Yang, PENG Yuwei
doaj +1 more source
Query Optimization in Teradata Warehouse
Journal of Telecommunications and Information Technology, 2023 The time necessary for data processing is becoming shorter and shorter nowadays. This thesis presents a definition of the active data warehousing (ADW) paradigm.
Agnieszka Gosk
doaj +1 more source
On the Effectiveness of the Minimization Approach to the Query Optimization
Моделирование и анализ информационных систем, 2016 A standard problem of DBMSs usage is a lack of efficiency and high cost of the access to the stored data. The acceptable level of system performance may be achieved by query optimization technics that determine the most efficient way to execute a given ...
N. Mendkovich
doaj +1 more source