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Specifying Queries as Relational Expressions: The SQUARE Data Sublanguage.

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Title: Specifying Queries as Relational Expressions: The SQUARE Data Sublanguage.
Authors: Boyce, Raymond F.1, Chamberlin, Donald D.1, King, III, W. Frank1, Hammer, Michael M.2
Source: Communications of the ACM. Nov75, Vol. 18 Issue 11, p621-628. 8p.
Subjects: Sublanguage, Problem solving, Language & languages, Quantifiers (Linguistics), Relational calculus, Calculus, Syntax (Grammar), Mathematics, Information storage & retrieval systems
Abstract: This paper presents a data sublanguage called SQUARE, intended for use in ad hoc, interactive problem solving by non-computer specialists. SQUARE is based on the relational model of data, and is shown to be relationally complete; however, it avoids the quantifiers and bound variables required by languages based on the relational calculus. Facilities for query, insertion, deletion, and update on tabular data bases are described. A syntax is given, and suggestions are made for alternative syntaxes, including a syntax based on English key words for users with limited mathematical back ground. [ABSTRACT FROM AUTHOR]
Copyright of Communications of the ACM is the property of Association for Computing Machinery and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Specifying Queries as Relational Expressions: The SQUARE Data Sublanguage.
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  Data: <searchLink fieldCode="DE" term="%22Sublanguage%22">Sublanguage</searchLink><br /><searchLink fieldCode="DE" term="%22Problem+solving%22">Problem solving</searchLink><br /><searchLink fieldCode="DE" term="%22Language+%26+languages%22">Language & languages</searchLink><br /><searchLink fieldCode="DE" term="%22Quantifiers+%28Linguistics%29%22">Quantifiers (Linguistics)</searchLink><br /><searchLink fieldCode="DE" term="%22Relational+calculus%22">Relational calculus</searchLink><br /><searchLink fieldCode="DE" term="%22Calculus%22">Calculus</searchLink><br /><searchLink fieldCode="DE" term="%22Syntax+%28Grammar%29%22">Syntax (Grammar)</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematics%22">Mathematics</searchLink><br /><searchLink fieldCode="DE" term="%22Information+storage+%26+retrieval+systems%22">Information storage & retrieval systems</searchLink>
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  Data: This paper presents a data sublanguage called SQUARE, intended for use in ad hoc, interactive problem solving by non-computer specialists. SQUARE is based on the relational model of data, and is shown to be relationally complete; however, it avoids the quantifiers and bound variables required by languages based on the relational calculus. Facilities for query, insertion, deletion, and update on tabular data bases are described. A syntax is given, and suggestions are made for alternative syntaxes, including a syntax based on English key words for users with limited mathematical back ground. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Communications of the ACM is the property of Association for Computing Machinery and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1145/361219.361221
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      – Code: eng
        Text: English
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      – SubjectFull: Sublanguage
        Type: general
      – SubjectFull: Problem solving
        Type: general
      – SubjectFull: Language & languages
        Type: general
      – SubjectFull: Quantifiers (Linguistics)
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      – SubjectFull: Relational calculus
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      – SubjectFull: Syntax (Grammar)
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      – SubjectFull: Mathematics
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      – SubjectFull: Information storage & retrieval systems
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      – TitleFull: Specifying Queries as Relational Expressions: The SQUARE Data Sublanguage.
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              Text: Nov75
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              Y: 1975
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