2710	 Specifying Queries as Relational Expressions The SQUARE Data Sublanguage	 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. database data sublanguages relations query languages casual user relational data model tabular data interactive problem solving nonprocedural languages relational completeness
