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98 lines
3.3 KiB
Markdown
98 lines
3.3 KiB
Markdown
---
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machine_translated: true
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machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
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toc_priority: 35
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toc_title: "\u0648\u0627\u0698\u0647\u0646\u0627\u0645\u0647"
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---
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# واژهنامه {#dictionary}
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این `Dictionary` موتور نمایش [واژهنامه](../../../sql-reference/dictionaries/external-dictionaries/external-dicts.md) داده ها به عنوان یک جدول کلیک.
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به عنوان مثال, در نظر گرفتن یک فرهنگ لغت از `products` با پیکربندی زیر:
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``` xml
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<dictionaries>
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<dictionary>
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<name>products</name>
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<source>
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<odbc>
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<table>products</table>
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<connection_string>DSN=some-db-server</connection_string>
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</odbc>
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</source>
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<lifetime>
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<min>300</min>
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<max>360</max>
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</lifetime>
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<layout>
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<flat/>
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</layout>
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<structure>
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<id>
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<name>product_id</name>
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</id>
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<attribute>
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<name>title</name>
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<type>String</type>
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<null_value></null_value>
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</attribute>
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</structure>
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</dictionary>
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</dictionaries>
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```
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پرس و جو داده فرهنگ لغت:
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``` sql
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SELECT
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name,
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type,
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key,
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attribute.names,
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attribute.types,
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bytes_allocated,
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element_count,
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source
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FROM system.dictionaries
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WHERE name = 'products'
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```
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``` text
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┌─name─────┬─type─┬─key────┬─attribute.names─┬─attribute.types─┬─bytes_allocated─┬─element_count─┬─source──────────┐
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│ products │ Flat │ UInt64 │ ['title'] │ ['String'] │ 23065376 │ 175032 │ ODBC: .products │
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└──────────┴──────┴────────┴─────────────────┴─────────────────┴─────────────────┴───────────────┴─────────────────┘
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```
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شما می توانید از [دیکته کردن\*](../../../sql-reference/functions/ext-dict-functions.md#ext_dict_functions) تابع برای دریافت داده های فرهنگ لغت در این فرمت.
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این دیدگاه مفید نیست که شما نیاز به دریافت داده های خام, و یا در هنگام انجام یک `JOIN` عمل برای این موارد می توانید از `Dictionary` موتور, که نمایش داده فرهنگ لغت در یک جدول.
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نحو:
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``` sql
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CREATE TABLE %table_name% (%fields%) engine = Dictionary(%dictionary_name%)`
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```
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مثال طریقه استفاده:
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``` sql
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create table products (product_id UInt64, title String) Engine = Dictionary(products);
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```
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Ok
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نگاهی به در چه چیزی در جدول.
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``` sql
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select * from products limit 1;
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```
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``` text
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┌────product_id─┬─title───────────┐
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│ 152689 │ Some item │
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└───────────────┴─────────────────┘
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```
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[مقاله اصلی](https://clickhouse.tech/docs/en/operations/table_engines/dictionary/) <!--hide-->
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