Time-by-Example Query Language for Historical Databases

  • Authors:
  • A. U. Tansel;M. E. Arkun;G. Ösoyoğlu

  • Affiliations:
  • Baruch College, New York, NY;Bilkent Univ., Ankara, Turkey;Case Western Reserve Univ., Cleveland, OH

  • Venue:
  • IEEE Transactions on Software Engineering
  • Year:
  • 1989

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Abstract

The authors propose a graphical query language, Time-by-Example (TBE), which has suitable constructs for interacting with historical relational databases in a natural way. TBE is user-friendly. It follows the graphical, two-dimensional approach of such previous languages as Query-by-Example (QBE), Aggregation-by-Example (ABE), and Summary-Table-by-Example (STBE). TBE also uses the hierarchical window (subquery) concept of ABE and STBE. TBE manipulates triple-valued (set-triple-valued) attributes and historical relations. Set-theoretic expressions are followed to deal with time intervals. The BNF specification for TBE is given.