Building a Bronze‑Silver‑Gold Medallion Lakehouse in DuckDB
The article walks through a full Python/DuckDB implementation of the medallion (bronze/silver/gold) pattern, turning raw CSVs into clean, aggregated tables with reproducible SQL transformations. By showing a lightweight, local‑only stack, it lets teams adopt data‑lakehouse best practices without costly Spark clusters, improving data quality and traceability.