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Description
  • Due to increasing capacity of storage devices and speed of computer networks during last years, it is still more required to sort and search data effectively. A query result containing thousands of rows from a relational database is usually useless and unreadable. In that situation, users may prefer to define constraints and sorting priorities in the query, and see only several top rows from the result. This paper deals with top-k queries problems, extension of relational algebra by new operators and their implementation in a database system. It focuses on optimization of operations join and sort. The work also includes implementation and comparison of some algorithms in standalone .NET library NRank.
  • Due to increasing capacity of storage devices and speed of computer networks during last years, it is still more required to sort and search data effectively. A query result containing thousands of rows from a relational database is usually useless and unreadable. In that situation, users may prefer to define constraints and sorting priorities in the query, and see only several top rows from the result. This paper deals with top-k queries problems, extension of relational algebra by new operators and their implementation in a database system. It focuses on optimization of operations join and sort. The work also includes implementation and comparison of some algorithms in standalone .NET library NRank. (en)
Title
  • NRank: A Unified Platform Independent Approach for Top-K Algorithms
  • NRank: A Unified Platform Independent Approach for Top-K Algorithms (en)
skos:prefLabel
  • NRank: A Unified Platform Independent Approach for Top-K Algorithms
  • NRank: A Unified Platform Independent Approach for Top-K Algorithms (en)
skos:notation
  • RIV/00216208:11320/12:10123432!RIV13-GA0-11320___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GAP202/10/0761)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 154919
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11320/12:10123432
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Rank Join; Relational Database; Top-k Query (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [0DCB25C23083]
http://linked.open...v/mistoKonaniAkce
  • Řím, Italie
http://linked.open...i/riv/mistoVydani
  • Stubal, Portugalsko
http://linked.open...i/riv/nazevZdroje
  • DATA 2012 - Proceedings of the International Conference on Data Technologies and Applications
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Čech, Martin
  • Pokorný, Jaroslav
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
number of pages
http://bibframe.org/vocab/doi
  • 10.5220/0003966901110116
http://purl.org/ne...btex#hasPublisher
  • SciTePress
https://schema.org/isbn
  • 978-989-8565-18-1
http://localhost/t...ganizacniJednotka
  • 11320
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