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* split up select.md * array-join.md basic refactoring * distinct.md basic refactoring * format.md basic refactoring * from.md basic refactoring * group-by.md basic refactoring * having.md basic refactoring * additional index.md refactoring * into-outfile.md basic refactoring * join.md basic refactoring * limit.md basic refactoring * limit-by.md basic refactoring * order-by.md basic refactoring * prewhere.md basic refactoring * adjust operators/index.md links * adjust sample.md links * adjust more links * adjust operatots links * fix some links * adjust aggregate function article titles * basic refactor of remaining select clauses * absolute paths in make_links.sh * run make_links.sh * remove old select.md locations * translate docs/es * translate docs/fr * translate docs/fa * remove old operators.md location * change operators.md links * adjust links in docs/es * adjust links in docs/es * minor texts adjustments * wip * update machine translations to use new links * fix changelog * es build fixes * get rid of some select.md links * temporary adjust ru links * temporary adjust more ru links * improve curly brace handling * adjust ru as well * fa build fix * ru link fixes * zh link fixes * temporary disable part of anchor checks
23 lines
1.1 KiB
Markdown
23 lines
1.1 KiB
Markdown
---
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machine_translated: true
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machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
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toc_folder_title: Diccionario
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toc_priority: 35
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toc_title: "Implantaci\xF3n"
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---
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# Diccionario {#dictionaries}
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Un diccionario es un mapeo (`key -> attributes`) que es conveniente para varios tipos de listas de referencia.
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ClickHouse admite funciones especiales para trabajar con diccionarios que se pueden usar en consultas. Es más fácil y más eficiente usar diccionarios con funciones que un `JOIN` con tablas de referencia.
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[NULL](../../sql-reference/syntax.md#null-literal) los valores no se pueden almacenar en un diccionario.
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Soporta ClickHouse:
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- [Diccionarios incorporados](internal-dicts.md#internal_dicts) con una específica [conjunto de funciones](../../sql-reference/functions/ym-dict-functions.md).
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- [Diccionarios complementarios (externos)](external-dictionaries/external-dicts.md#dicts-external-dicts) con un [conjunto de funciones](../../sql-reference/functions/ext-dict-functions.md).
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[Artículo Original](https://clickhouse.tech/docs/en/query_language/dicts/) <!--hide-->
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