.parquet — Apache Parquet
Data application/vnd.apache.parquet
What a .parquet file is
A columnar storage format built for analytics. Because it stores each column together, queries that touch a few columns of a huge table read far less data.
How to open it
Pandas, DuckDB, Spark, or the DuckDB CLI for a quick look.
Worth knowing
Typically 5–10× smaller than the equivalent CSV, and much faster to query. Not human-readable.
Other data formats
- .csv — Comma-Separated Values
- .json — JavaScript Object Notation
- .yaml — YAML Ain't Markup Language
- .sql — SQL Script