Bibliographic Details
| 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] |
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| Database: |
Engineering Source |
