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المؤلفون: R. P. Kramorenko, N. A. Polyakovskaya
المصدر: Cybernetics and Systems Analysis. 33:345-353
مصطلحات موضوعية: Relational calculus, General Computer Science, Relational database management system, Computer science, Programming language, Relational model, Sargable, computer.software_genre, computer, Differentiation rules, Data independence