ClickHouse/docs/es/sql-reference/dictionaries/index.md

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---
machine_translated: true
machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
toc_folder_title: Diccionario
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toc_priority: 35
toc_title: "Implantaci\xF3n"
---
# Diccionario {#dictionaries}
Un diccionario es un mapeo (`key -> attributes`) que es conveniente para varios tipos de listas de referencia.
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.
DOCS-624: Fixing links to nowhere (#10675) * enbaskakova-DOCSUP-652 (#101) * "docs(orNull&orDefault): Functions 'orNull&orDefault' have been edited" * "docs(orNull&orDefault): Functions 'orNull&orDefault' have been edited" * "docs(orNull&orDefault): Functions 'orNull&orDefault' have been edited" * Update docs/en/sql_reference/aggregate_functions/combinators.md Co-Authored-By: BayoNet <da-daos@yandex.ru> * Update docs/en/sql_reference/aggregate_functions/combinators.md Co-Authored-By: BayoNet <da-daos@yandex.ru> * Update docs/en/sql_reference/aggregate_functions/combinators.md Co-Authored-By: BayoNet <da-daos@yandex.ru> * Update docs/en/sql_reference/aggregate_functions/combinators.md Co-Authored-By: BayoNet <da-daos@yandex.ru> * Update docs/en/sql_reference/aggregate_functions/combinators.md Co-Authored-By: BayoNet <da-daos@yandex.ru> * "docs(orNull&orDefault): Functions 'orNull&orDefault' have been edited" * "docs(orNull&orDefault): Functions 'orNull&orDefault' have been edited" * "docs(orNull&orDefault): Functions 'orNull&orDefault' have been edited" Co-authored-by: elenbaskakova <elenbaskakova@yandex-team.ru> Co-authored-by: BayoNet <da-daos@yandex.ru> * Revert "enbaskakova-DOCSUP-652 (#101)" (#107) This reverts commit 639fee7610f28e421d14e535b7def3f466e7efca. * CLICKHOUSEDOCS-624: Fixed links. Was 60, became 13. * CLICKHOUSEDOCS-624: Finished fix links in Enlish version. * CLICKHOUSEDOCS-624: Fixed RU links Co-authored-by: elenaspb2019 <47083263+elenaspb2019@users.noreply.github.com> Co-authored-by: elenbaskakova <elenbaskakova@yandex-team.ru> Co-authored-by: Sergei Shtykov <bayonet@yandex-team.ru>
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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:
- [Diccionarios incorporados](internal-dicts.md#internal_dicts) con una específica [conjunto de funciones](../../sql-reference/functions/ym-dict-functions.md).
- [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-->