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---
# Sözlük {#dictionary}
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Bu `Dictionary` motor görüntüler [sözlük ](../../../sql-reference/dictionaries/external-dictionaries/external-dicts.md ) bir ClickHouse tablo olarak veri.
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Örnek olarak, bir sözlük düşünün `products` aşağı daki yapı landı rma ile:
``` xml
< dictionaries >
< dictionary >
< name > products< / name >
< source >
< odbc >
< table > products< / table >
< connection_string > DSN=some-db-server< / connection_string >
< / odbc >
< / source >
< lifetime >
< min > 300< / min >
< max > 360< / max >
< / lifetime >
< layout >
< flat / >
< / layout >
< structure >
< id >
< name > product_id< / name >
< / id >
< attribute >
< name > title< / name >
< type > String< / type >
< null_value > < / null_value >
< / attribute >
< / structure >
< / dictionary >
< / dictionaries >
```
Sözlük verilerini sorgula:
``` sql
SELECT
name,
type,
key,
attribute.names,
attribute.types,
bytes_allocated,
element_count,
source
FROM system.dictionaries
WHERE name = 'products'
```
``` text
┌─name─────┬─type─┬─key────┬─attribute.names─┬─attribute.types─┬─bytes_allocated─┬─element_count─┬─source──────────┐
│ products │ Flat │ UInt64 │ ['title'] │ ['String'] │ 23065376 │ 175032 │ ODBC: .products │
└──────────┴──────┴────────┴─────────────────┴─────────────────┴─────────────────┴───────────────┴─────────────────┘
```
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Kullanabilirsiniz [dictGet\* ](../../../sql-reference/functions/ext-dict-functions.md#ext_dict_functions ) sözlük verilerini bu formatta almak için işlev.
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Bu görünüm, ham veri almanı z gerektiğinde veya bir `JOIN` operasyon. Bu durumlar için şunları kullanabilirsiniz `Dictionary` bir tabloda sözlük verilerini görüntüleyen motor.
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Sözdizimi:
``` sql
CREATE TABLE %table_name% (%fields%) engine = Dictionary(%dictionary_name%)`
```
Kullanı m örneği:
``` sql
create table products (product_id UInt64, title String) Engine = Dictionary(products);
```
Ok
Masada ne olduğuna bir bak.
``` sql
select * from products limit 1;
```
``` text
┌────product_id─┬─title───────────┐
│ 152689 │ Some item │
└───────────────┴─────────────────┘
```
[Orijinal makale ](https://clickhouse.tech/docs/en/operations/table_engines/dictionary/ ) <!--hide-->