Saturday, October 26, 2019
Data Sublanguage Part 4: Conclusion
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In Parts 1 , 2 , and 3 we showed that when the RDM is the data model: A data sublanguage is short for data manipulation language (DML) ...
Saturday, October 19, 2019
Brother, Spare Me the "Paradigms"
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Note: This is a revised version of an old column @All Analytics in response to a recent LinkedIn exchange (check out my comments in the e...
Friday, October 18, 2019
Testing Your Foundation Knowledge
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The Web is chockful of unnoticed/unquestioned pronouncements by novices or self-taught "experts", that are (1) wrong, or (2) gobb...
Friday, October 11, 2019
Data Sublanguage Part 3: DBMS Language
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Note: 10/10/2019 significantly revised Part 2, which requires a re-read. A formal data model consists of structure, integrity and manipula...
Friday, October 4, 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 (2...
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...
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