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Contribution Details

Type Book Chapter
Scope Discipline-based scholarship
Title SQL-Based Temporal Query Languages
Organization Unit
Authors
  • Michael Hanspeter Böhlen
  • Johann Gamper
  • Christian Jensen
  • Richard Snodgrass
Editors
  • Ling Liu
  • M Tamer Oezsu
Item Subtype Original Work
Refereed Yes
Status Published in final form
Language
  • English
Booktitle Encyclopedia of Database Systems, Second Edition
ISBN 978-1-4614-8266-6
Place of Publication New York, NY, USA
Publisher Springer
Page Range 55
Date 2018
Abstract Text More than two dozen extensions to the relational data model have been proposed that support the storage and retrieval of time-referenced data. These models timestamp tuples or attribute values, and the timestamps used include time points, time periods, and finite unions of time periods, termed temporal elements. A temporal query language is defined in the context of a specific data model. Most notably, it supports the specification of queries on the specific form of time-referenced data provided by its data model. More generally, it enables the management of time-referenced data. Different approaches to the design of a temporal extension to the Structured Query Language (SQL) have emerged that yield temporal query languages with quite different design properties.
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