Friday, September 27, 2019
Data Sublanguage Part 2: Data Manipulation and Definition
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Revised 10/10/2019. In Part 1 we showed that Codd intended in 1969 to base the RDM on axiomatic set theory (AST) and second order logic ...
Wednesday, September 25, 2019
Testing Your Foundation Knowledge
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The Web is chockful of unnoticed/unquestioned pronouncements by self-taught novices or "experts" that are (1) wrong, or (2) gobble...
Sunday, September 22, 2019
Data Sublanguage Part 1: Relational vs. Computational Completeness
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Note: I have revised the "Logical Access, Data Sublanguage, Kinds of Relations, Database Redundancy, and Consistency" paper in th...
Tuesday, September 17, 2019
Testing Your Foundation Knowledge
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The Web is chockful of unnoticed/unquestioned pronouncements by novices or "experts", many self-taught, that are (1) wrong, or (...
Sunday, August 25, 2019
Meaning Criteria and Entity Supertype-Subtypes Relationships
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Note: This is a re-write of a previous post. "I have a database for a school ... [with] numerous tables obviously, but consider th...
Saturday, June 29, 2019
Re-write
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Understanding Conceptual vs. Data Modeling Part 4: Properties-object Modeling
Friday, June 21, 2019
Data Meaning and Mining: Knowledge Representation and Discovery
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Note: This is a re-write -- prompted by a LinkedIn exchange -- of two columns I published @All Analytics. “Scientific research experime...
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