Rill lets you define BI workflows—models, metrics, dashboards and access policies—in YAML and SQL, and runs queries on engines like ClickHouse or DuckDB. It adds conversational and agent-driven interfaces for natural-language querying and automated dashboard generation, with real-time performance, embeddable dashboards, and Git-backed deployments.

The author shares their shift from using Excel and Google Sheets to DuckDB and SQL for handling CSV files, highlighting the efficiency of querying data directly. They discuss the benefits of using SQL for data manipulation and invite readers to share their own CSV handling tips.

DuckDB has proven to be superior to Polars when handling large datasets, particularly 1TB of data. While DuckDB effectively manages memory and execution with a robust design, Polars struggles with large data processing, leading to out-of-memory errors.