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Time and Relational Theory
Penulis: C. J. Date •
Identifier: --cjdate-1205
Here for purposes of reference are formal definitions for the example, expressed in a language called Tutorial D””or, rather, in a version of that language that’s been tailored slightly in order to suit the purposes of this book. Tutorial D is a computationally complete programming language with fully integrated database functionality and, we believe, more or less self-explanatory syntax. It was introduced in the first (1998) edition of reference [52] as a vehicle for teaching database concepts. All coding examples in this book are expressed in that language or certain specified extensions thereto (except, of course, for the SQL-specific examples in Part IV).