Logical schema | Wikipedia audio article

Описание: This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Logical...


00:00:25 1 Overview
00:01:34 2 History
00:02:09 3 Logical data model topics
00:02:19 3.1 Reasons for building a logical data structure
00:02:41 3.2 Conceptual, logical and physical data model
00:03:21 4 See also



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SUMMARY
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A logical data model or logical schema is a data model of a specific problem domain expressed independently of a particular database management product or storage technology (physical data model) but in terms of data structures such as relational tables and columns, object-oriented classes, or XML tags. This is as opposed to a conceptual data model, which describes the semantics of an organization without reference to technology.