August 2024
Intermediate to advanced
616 pages
22h 8m
Spanish
Content preview from Diseño de aplicaciones intensivas en datos
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Capítulo 2. Modelos de datos y lenguajes de consulta
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Los límites de mi lengua significan los límites de mi mundo.
Ludwig Wittgenstein, Tractatus Logico-Philosophicus (1922)
Los modelos de datos son quizás la parte más importante del desarrollo de software, porque tienen un efecto muy profundo: no sólo en cómo se escribe el software, sino también en cómo pensamos sobre el problemaque estamos resolviendo.
La mayoría de las aplicaciones se construyen superponiendo un modelo de datos sobre otro. Para cada capa, la pregunta clave es: ¿cómo se representa en términos de la capa inmediatamente inferior? Por ejemplo:
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Como desarrollador de aplicaciones, observas el mundo real (en el que hay personas, organizaciones, bienes, acciones, flujos de dinero, sensores, etc.) y lo modelas en términos de objetos o estructuras de datos, y API que manipulan esas estructuras de datos. Esas estructuras suelen ser específicas de tu aplicación.
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Cuando quieres almacenar esas estructuras de datos, las expresas en términos de un modelo de datos de propósito general, como documentos JSON o XML, tablas en una base de datos relacional o un modelo de grafos.
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Los ingenieros que construyeron tu software de base de datos decidieron una forma de representar esos datos JSON/XML/relacionales/gráficos ...
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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.