July 2024
Intermediate to advanced
1032 pages
36h 33m
English
Content preview from Information Modeling and Relational Databases, 3rd Edition
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2 Information Levels and Frameworks
Abstract
This chapter discusses four information levels (conceptual, logical, physical, external), four aspects of the conceptual level (asserted fact types, constraints, derivation rules, transactions), gives a database design example, and then discusses development frameworks.
Keywords
Information level; Conceptual level; Logical level; Physical level; External level; Information framework; Database design; Development framework
2.1 Four Information Levels
Some advanced information systems are described as “intelligent”. What intelligence is and whether machines will ever ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.