mirror of https://github.com/CrimsonTome/tldr.git
37 lines
1008 B
Markdown
37 lines
1008 B
Markdown
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# duckdb
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> Command-line client for DuckDB, an in-process analytical SQL engine.
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> More information: <https://duckdb.org>.
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- Start an interactive shell with a transient in-memory database:
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`duckdb`
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- Start an interactive shell on a database file. If the file does not exist, a new database is created:
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`duckdb {{path/to/dbfile}}`
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- Directly query a CSV, JSON, or Parquet file:
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`duckdb -c "{{SELECT * FROM 'data_source.[csv|csv.gz|json|json.gz|parquet]'}}"`
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- Run a SQL script:
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`duckdb -c ".read {{path/to/script.sql}}"`
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- Run query on database file and keep the interactive shell open:
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`duckdb {{path/to/dbfile}} -cmd "{{SELECT DISTINCT * FROM tbl}}"`
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- Run SQL queries in file on database and keep the interactive shell open:
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`duckdb {{path/to/dbfile}} -init {{path/to/script.sql}}`
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- Read CSV from stdin and write CSV to stdout:
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`cat {{path/to/source.csv}} | duckdb -c "{{COPY (FROM read_csv_auto('/dev/stdin')) TO '/dev/stdout' WITH (FORMAT CSV, HEADER)}}"`
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- Display help:
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`duckdb -help`
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