A Relational-Calculus Query Language For Historical Databases

    Authors

    M. A. Bassiouni;M. J. Llewellyn

    Comments

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    Abbreviated Journal Title

    Comput. Lang.

    Keywords

    HISTORICAL DATABASES; QUERY LANGUAGES; BOOLEAN OPERATORS; TEMPORAL; LOGIC; RELATIONAL-CALCULUS; RELATIONAL USER INTERFACES; TEMPORAL DATABASES; MODEL; Computer Science, Software Engineering

    Abstract

    In this paper, an approach to handle time in relational query languages is outlined. The approach is based on extending Boolean and comparison operators by allowing their operands to be sets of intervals. The proposed temporal logic is shown to satisfy the properties of the normal Boolean logic. A relational-calculus query language using the extended logic is developed. The extended logic presented in this paper provides a good degree of flexibility in expressing different temporal requirements and therefore promises to be a successful approach for designing powerful temporal query languages.

    Journal Title

    Computer Languages

    Volume

    17

    Issue/Number

    3

    Publication Date

    1-1-1992

    Document Type

    Article

    Language

    English

    First Page

    185

    Last Page

    197

    WOS Identifier

    WOS:A1992HG33100004

    ISSN

    0096-0551

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