Sunday, November 26, 2017
What Relations Really Are and Why They Are Important
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Note: Some of the References have been re-written to bring them into line with the McGoveran formalization and interpretation [1] of Codd...
Sunday, November 19, 2017
This Week
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1. Database Truth of the Week "Codd's original 'normal form' in 1969-70 is not equivalent to the current 1NF. The for...
Wednesday, November 8, 2017
Understanding Conceptual vs. Data Modeling Part 1: Data Model - The RDM Is, the E/RM Isn't
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Re-write 10/16/18 “E/RM is a data model -- So says Date, Chen, etc. So says the majority of current industry experts ... With very stron...
Sunday, November 5, 2017
This Week
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1. Database Truth of the Week "Logical (aka. syntactic) validity: Every logical inference (application of any number of rules of ...
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Monday, October 30, 2017
The Importance of Understanding Classes, Sets, and Relations for Analytics
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One of the clearest indications of poor foundation knowledge in data management practice is misuse and abuse of terminology. Many data pro...
Sunday, October 29, 2017
Database Design: What It Is and Isn't
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Revised 10/31/17. Note: Posts starting with this one will be consistent with the TERMINOLOGY page. Fundamental terms -- the grasp of whic...
Sunday, October 22, 2017
This Week
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1. Database Truth of the Week "The original normal form and the later First Normal Form (1) are distinct. In the early 1969 RDM t...
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