Results 31 to 40 of about 198,739 (283)
Efficient and Provable Multi-Query Optimization
, 2017 Complex queries for massive data analysis jobs have become increasingly commonplace. Many such queries contain com- mon subexpressions, either within a single query or among multiple queries submitted as a batch.
Kathuria, Tarun, Sudarshan, S.
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Trade-Offs Computing Minimum Hub Cover Toward Optimized Labeled Graph Query Processing
Online Academic Journal of Information Technology, 2018 As techniques for graph query processing mature, the need for optimization is increasingly becoming an imperative. Indices are one of the key ingredients toward efficient query processing strategies via cost-based optimization.
Hasan M. Jamil +3 more
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Learned Query Optimization by Constraint-Based Query Plan Augmentation
MathematicsOver the last decades, various cost-based optimizers have been proposed to generate optimal plans for SQL queries. These optimizers are key to achieving good performance in database systems and can speed up query execution.
Chen Ye +4 more
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Review of Multi-table Join Order Selection in Databases Based on Machine Learning [PDF]
Jisuanji gongchengMulti-table join order selection refers to the process of determining the optimal join sequence among the tables involved in a query during query optimization, to improve execution performance.
WANG Hao, GAO Jintao, WANG Jie
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Research and Implementation of Document-Relational Data Query Execution Tech-nology
Jisuanji kexue yu tansuo, 2020 With the arrival of the era of big data, Internet applications have produced abundant data types. Integ-rating storage, query and organization of data with various structures is a research hotspot of large data management system.
MA Zhicheng, YUAN Haifeng, GU Yang, LIU Yaru, ZHANG Xiao
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Constraint-based Query Distribution Framework for an Integrated Global Schema
, 2009 Distributed heterogeneous data sources need to be queried uniformly using global schema. Query on global schema is reformulated so that it can be executed on local data sources.
Iftikhar, Nadeem +3 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Neuroblastoma is the most common extracranial solid tumor in early childhood. Its clinical behavior is highly variable, ranging from spontaneous regression to fatal outcome despite intensive treatment. The International Society of Pediatric Oncology Europe Neuroblastoma Group (SIOPEN) Radiology and Nuclear Medicine Specialty Committees ...
Annemieke Littooij +11 more
wiley +1 more source
Relational Approach to Logical Query Optimization of XPath [PDF]
, 2004 To be able to handle the ever growing volumes of XML documents, effective and efficient data management solutions are needed. Managing XML data in a relational DBMS has great potential.
Keulen, Maurice van
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Introduction Adolescent siblings of children with cancer are at elevated risk for psychosocial problems. Unfortunately, various barriers such as limited family time and resources, conflicting schedules, and psychosocial staffing constraints at cancer centers hinder sibling access to support.
Christina M. Amaro +10 more
wiley +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT A second allogeneic (allo‐)hematopoietic stem cell transplantation (HSCT2) is a potential curative option for pediatric patients with acute lymphoblastic leukemia (ALL) following relapse after first allogeneic transplantation (HSCT1), but its efficacy is limited by high relapse rates and transplant‐related toxicity in highly pretreated ...
Ava Momm +10 more
wiley +1 more source