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50 lines
1.6 KiB
Markdown
50 lines
1.6 KiB
Markdown
<a name="table_functions-file"></a>
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# file
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Создаёт таблицу из файла.
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```
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file(path, format, structure)
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```
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**Входные параметры**
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- `path` — относительный путь до файла от [user_files_path](../../operations/server_settings/settings.md#user_files_path).
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- `format` — [формат](../../interfaces/formats.md#formats) файла.
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- `structure` — структура таблицы. Формат `'colunmn1_name column1_ype, column2_name column2_type, ...'`.
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**Возвращаемое значение**
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Таблица с указанной структурой, предназначенная для чтения или записи данных в указанном файле.
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**Пример**
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Настройка `user_files_path` и содержимое файла `test.csv`:
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```bash
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$ grep user_files_path /etc/clickhouse-server/config.xml
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<user_files_path>/var/lib/clickhouse/user_files/</user_files_path>
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$ cat /var/lib/clickhouse/user_files/test.csv
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1,2,3
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3,2,1
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78,43,45
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```
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Таблица из `test.csv` и выборка первых двух строк из неё:
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``` sql
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SELECT *
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FROM file('test.csv', 'CSV', 'column1 UInt32, column2 UInt32, column3 UInt32')
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LIMIT 2
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```
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```
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┌─column1─┬─column2─┬─column3─┐
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│ 1 │ 2 │ 3 │
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│ 3 │ 2 │ 1 │
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└─────────┴─────────┴─────────┘
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```
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[Оригинальная статья](https://clickhouse.yandex/docs/ru/query_language/table_functions/file/) <!--hide-->
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