Sigma Computing revolutionizes analytics by providing a spreadsheet-like interface that queries cloud data warehouses like Snowflake and BigQuery in real time. Unlike traditional BI tools that require pre-aggregated datasets, Sigma enables granular analysis directly on terabytes of detailed data. Finance teams perform ad-hoc variance analysis, while marketing analysts explore customer journeys without waiting for IT-prepared datasets. Key features include collaborative workbook editing, parameterized dashboards, and Python integration for advanced analytics. The platform's unique architecture pushes computations to the underlying data warehouse, ensuring performance scales with cloud resources while maintaining security through column-level permissions. This approach eliminates data extracts and stale reports common in traditional BI workflows.