ClickHouse/docs/en/faq/integration/file-export.md

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How do I export data from ClickHouse to a file?	true	10

How Do I Export Data from ClickHouse to a File?

Using INTO OUTFILE Clause

Add an INTO OUTFILE clause to your query.

For example:

SELECT * FROM table INTO OUTFILE 'file'

By default, ClickHouse uses the TabSeparated format for output data. To select the data format, use the FORMAT clause.

For example:

SELECT * FROM table INTO OUTFILE 'file' FORMAT CSV

Using a File-Engine Table

See File table engine.

Using Command-Line Redirection

$ clickhouse-client --query "SELECT * from table" --format FormatName > result.txt

See clickhouse-client.