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Results tagged with relational-theory
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On this site this tag applies to questions about Relational Model theory. The Relational Model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic. In the Relational Model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the Relational Model is a relational database.
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Definition for "logical difference"?
I'm currently reading "SQL and Relational Theory" by C.J. Date. And although I'm quite far in the book, I've got a few basic questions. I want to know what the term "logical difference" means, The boo …
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4
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6th normal form, recomposition query, efficient implementation
I found this paper written by Hugh Darwen for avoiding nulls in my database: Link, It describes how to implement databases in the 6th normal form so you can avoid nulls. The logic is described in the …
- 267