Human factors evaluation of two data base query languages
Phyllis Reisner, Raymond F. Boyce, Donald D. Chamberlin · 1975
Boyce et al. have recently described two data base query languages, SQUARE and SEQUEL, which are intended for use in an interactive mode by both programmers and professional non-programmers (e.g., accountants, lawyers, managers). The languages are comparable in the sense that the basic operators, underlying data structures and intended use are the same. They differ primarily in syntactic form, with a few additional differences in some of the specific features. Both of the languages are intended to be easily learned and used by people without specialized computer training.