Showing posts with label RDM. Show all posts
Showing posts with label RDM. Show all posts
Monday, June 17, 2024

SQL AT 50, OR WHY THERE ARE NO RDBMS'S

›
In "Codd Almighty!   Has it been half a century of SQL already?" the Register's Lindsay Clark interviews "Donald Chamberl...
Thursday, May 2, 2024

SMS: PRIMARY KEYS & INDEXES

›
I am working on entirely new papers (not re-writes) in the PRACTICAL DATABASE FOUNDATIONS series. I have already published two: THE FIRST NO...
Monday, February 5, 2024

METALOGICAL PROPERTIES Part 2: Assertion Predicate

›
In Part 1 we introduced in the conceptual model (CM) the metalogical designation property . It represents—in the absence of known shared de...
Friday, October 13, 2023

EVERYBODY THINK THEY KNOW FIRST NORMAL FORM, BUT NOBODY DOES

›
“I have read this article in an effort to boost my academic knowledge on data modeling a bit and still have no idea what this academic autho...
Thursday, August 17, 2023

ENTITIES, PROPERTIES AND CODD'S SLEIGHT OF HAND

›
Note: This a revision of an earlier post RDM is an application to database management of mathematical relation theory (MRT) consistent wit...
Tuesday, July 25, 2023

NULL & THE "2ND ADDRESS LINE" (sms)

›
Note: In "Setting Matters Straight" posts I debunk online pronouncements that involve fundamentals which I first post on Linked...
Monday, June 19, 2023

PREDICATE LOGIC, SEMANTICS AND RDM (sms)

›
Note: In "Setting Matters Straight" posts I debunk online pronouncements that involve fundamentals which I first post on Linked...
Sunday, April 23, 2023

THE DENORMALIZATION ILLUSION (t&n)

›
Note: "Then & Now" (t&n) is a new version of what used to be the "Oldies but Goodies" (OBG) series. To demons...
Saturday, April 8, 2023

MISSING DATA: RDM VS SQL -- A REAL WORLD COMPARISON (t&n)

›
Note: "Then & Now" (t&n) is a new version of what used to be the "Oldies but Goodies" (OBG) series. To demonstra...
Sunday, March 26, 2023

RELATIONSHIPS AND THE RDM V2 PART 1: RELATIONS & DATABASE RELATIONS

›
with David McGoveran   Note: This a multi-part re-write of a previous series intended, when completed, to replace it. In the meantime you ca...
Sunday, March 19, 2023

ON PROPERTIES IN CONCEPTUAL MODELING (rm)

›
Note: Reader mail (rm) posts are exchanges with my readers that raise fundamental issues. I may improve language for clarity and amplify wi...
Saturday, February 4, 2023

CONCEPTUAL MODELING, LOGICAL DATABASE DESIGN AND PHYSICAL IMPLEMENTATION (sms)

›
Note: In "Setting Matters Straight" posts I debunk online pronouncements that involve fundamentals which I first post on Linked...
Sunday, January 22, 2023

CONCEPTUAL BUSINESS RULES AND LOGICAL CONSTRAINTS (sms)

›
Note: In "Setting Matters Straight" posts I debunk online pronouncements that involve fundamentals which I first post on Linked...
Monday, January 2, 2023

 NEW "DATA MODELS" 5.2 (t&n)

›
Note: "Then & Now" (T&N) is a new version of what used to be the "Oldies but Goodies" (OBG) series. To demons...
Tuesday, December 13, 2022

NEW "DATA MODELS" 5.1 (t&n)

›
Note: "Then & Now" (T&N) is a new version of what used to be the "Oldies but Goodies" (OBG) series. To demons...
Saturday, October 29, 2022

NEW "DATA MODELS" 3 (t&n)

›
Note: "Then & Now" (T&N) is a new version of what used to be the "Oldies but Goodies" (OBG) series. To demons...
Saturday, September 17, 2022

NEW "DATA MODELS" 1 (t&n)

›
Note: "Then & Now" (T&N) is a new version of what used to be the "Oldies but Goodies" (OBG) series. To demons...
Sunday, August 28, 2022

NOBODY UNDERSTANDS DATABASE DESIGN 1 (sms)

›
Note: In "Setting Matters Straight" posts I debunk online pronouncements that involve fundamentals which I first post on Linked...
Saturday, August 20, 2022

DATABASE RELATIONS, DATABASE DESIGN & CORRECTNESS (sms)

›
Note: In "Setting Matters Straight" posts I debunk online Q&As that involve fundamentals which I first post on LinkedIn. Th...
Thursday, August 4, 2022

DATABASE RELATIONS, TABLES AND SEMANTIC CONSISTENCY

›
by David McGoveran with Fabian Pascal   Note: In "Setting Matters Straight" posts I debunk online Q&As that involve fundament...