Sunday, August 27, 2017
Object Orientation, Relational Database Design, Logical Validity and Semantic Correctness
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Note: This is a 8/24/17 rewrite of a 5/20/13 post to bring it in line with McGoveran's formal exposition of Codd's RDM [1] and it...
2 comments:
Sunday, August 20, 2017
This Week
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1. Database Truth of the Week “... [one] limitation imposed by set semantics is the inability to express the concept of a computer varia...
1 comment:
Sunday, August 13, 2017
Relational Fidelity, Cursors and ORDER BY
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Here's what's wrong with last database picture, namely: "In a book I am reading (QUERYING SQL SERVER 2012) the author talks a...
Saturday, August 5, 2017
This Week
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1. Database Truth of the Week "Semantic correctness: every interpretation of the symbols (meaning assignment and truth value assi...
1 comment:
Tuesday, August 1, 2017
Structure, Integrity, Manipulation: How to Compare Data Models
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The IT industry operates like the fashion industry: every few years -- and the number keeps getting smaller -- a "new" data techn...
Sunday, July 30, 2017
Integrity Is Not Only Referential: DBMS vs Application Enforced Constraints
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Note: This is 07/30/17 rewrite of a 11/11/12 post to bring it line with McGoveran formal exposition of Codd's real RDM [1] and its int...
Sunday, July 23, 2017
This Week
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1. Database Truth of the Week "And [AI] weaknesses there are. Watson requires many months of laborious training, as experts must ...
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