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Author Hammer, Michael M. ♦ Boyce, Raymond F. ♦ King, W. Frank ♦ Chamberlin, Donald D.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Subject Keyword Relational data model ♦ Interactive problem solving ♦ Tabular data ♦ Casual user ♦ Nonprocedural languages ♦ Relational completeness ♦ Database ♦ Relations ♦ Data sublanguages ♦ Query languages
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 background.
Description Affiliation: Massachusetts Institute of Technology, Cambridge, MA (Hammer, Michael M.) || IBM Research Lab., San Jose, CA (Boyce, Raymond F.; Chamberlin, Donald D.; King, W. Frank)
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-08-01
Publisher Place New York
Journal Communications of the ACM (CACM)
Volume Number 18
Issue Number 11
Page Count 8
Starting Page 621
Ending Page 628


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Source: ACM Digital Library