By Raymond F. Boyce, Donald D. Chamberlin, W. Frank King, Michael M. Hammer
Communications of the ACM,
November 1975,
Vol. 18 No. 11, Pages 621-628
10.1145/361219.361221
Comments
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.
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