Saturday, November 30, 2019
TYFK: 5NF, Association Relations and Join
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Ass ume a conceptual model of a multigroup consisting of two related entity groups, Customers and Orders, where a customer can issue multi...
Friday, November 8, 2019
The CAP Theorem and the RDM: Consistency, Availability, Partitioning
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by David McGoveran I have recently posted on LinkedIn two "To Laugh or Cry?" quotes about advantages and disadvantages of ...
Friday, November 1, 2019
Comments on a Stonebraker Article
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These comments were prompted by a LinkedIn post referencing Michael Stonebraker's Those Who Forget the Past Are Doomed to Repeat It -...
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...
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