September 2024
Intermediate to advanced
356 pages
5h 19m
Spanish
Content preview from Guía SQL de Bolsillo, 4ª Edición
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Prefacio
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¿Por qué SQL?
Desde que se publicó la última edición de la Guía de Bolsillo SQL, han cambiado muchas cosas en el mundo de los datos. La cantidad de datos generados y recopilados se ha disparado, y se han creado una serie de herramientas y trabajos para gestionar la afluencia de datos. A pesar de todos los cambios, SQL ha seguido siendo parte integrante del panorama de los datos.
En los últimos 15 años, he trabajado como ingeniero, consultor, analista y científico de datos, y he utilizado SQL en cada una de mis funciones. Aunque mis principales responsabilidades se centraran en otra herramienta o habilidad, tenía que conocer SQL para acceder a los datos de una empresa.
Si hubiera un premio de lenguaje de programación al mejor actor secundario, SQL se llevaría el premio a casa.
A medida que surgen nuevas tecnologías, SQL sigue siendo lo más importante cuando se trata de trabajar con datos. Las soluciones de almacenamiento basadas en la nube como Amazon Redshift y Google BigQuery requieren que los usuarios escriban consultas SQL para extraer datos. Los marcos de procesamiento de datos distribuidos, como Hadoop y Spark, tienen como compañeros a Hive y Spark SQL, respectivamente, que proporcionan interfaces similares a SQL para que los usuarios analicen los datos.
SQL existe desde hace casi cinco décadas, y no va a desaparecer pronto. Es uno de los lenguajes ...
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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.