duckdb
CLIIn-process analytical SQL database engine.
Convert Parquet to CSV~97% est.
duckdb -c "COPY (SELECT * FROM 'data.parquet') TO 'output.csv' (HEADER, DELIMITER ',')"data2 recipes
psql
CLIPostgreSQL interactive terminal, used non-interactively for one-shot queries and scripts.
Export a query as CSVVerified macOS · Linux
psql "$DATABASE_URL" -Atc "COPY (SELECT slug, name FROM tools ORDER BY slug LIMIT 2) TO STDOUT WITH CSV HEADER"data4 recipes · 4 verified