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      • Department of Computer Engineering
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      A comparison of historical relational query languages

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      Author
      Tansel, Abdullah Uz
      Tin, E.
      Date
      1994-07
      Source Title
      The Second Biennial European Joint Conference on Engineering Systems Design and Analysis,1994
      Publisher
      ASME
      Pages
      275 - 282
      Language
      English
      Type
      Conference Paper
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      Abstract
      We introduce a historical relational data model in which N1NF relations are used and 1-level of nesting is allowed. Attributes can either be atomic or temporal atom. An atomic attribute represents a time invariant attribute. A temporal atom consists of two components, a value and a temporal set, which is a set of times denoting the validity period of the value. We define a relational tuple calculus for this model. We follow a comparative approach towards completeness of historical query languages.
      Keywords
      Computational complexity
      Data structures
      Relational database systems
      Historical database (HDB)
      Relational query languages
      Query languages
      Permalink
      http://hdl.handle.net/11693/27790
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      • Department of Computer Engineering 1368
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