Relational Data-Base Management Systems
ACM Computing Surveys (CSUR)
Implementation of integrity constraints and views by query modification
SIGMOD '75 Proceedings of the 1975 ACM SIGMOD international conference on Management of data
Is natural language an unnatural query language?
ACM '72 Proceedings of the ACM annual conference - Volume 2
SEQUEL: A structured English query language
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
Software psychology: Human factors in computer and information systems (Winthrop computer systems series)
A psychological study of query by example
AFIPS '75 Proceedings of the May 19-22, 1975, national computer conference and exposition
Human factors evaluation of two data base query languages: square and sequel
AFIPS '75 Proceedings of the May 19-22, 1975, national computer conference and exposition
The Peterlee relational test vehicle: a system overview
IBM Systems Journal
A data base sublanguage founded on the relational calculus
SIGFIDET '71 Proceedings of the 1971 ACM SIGFIDET (now SIGMOD) Workshop on Data Description, Access and Control
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Over the last decade many database management systems have been developed with one or more query languages for user manipulation and modification of data. This paper presents the results of a comparative analysis performed on eighteen query languages. The purpose of this analysis is to identify and categorize the features which influence the usability of the language. To this end, seven broad categories are detailed: data models, language functions, expression complexity, language format, environment, intended user expertise and interface facilities. These categories are described with examples from the languages. The framework this categorization begins to develop may be useful to perspective users as well as new language designers.