Vertica is a massively parallel processing (MPP) columnar analytics database designed for enterprise data warehousing. Unlike row-based databases, Vertica stores data by column, enabling rapid aggregations and scans across specific columns without reading irrelevant data. It runs as a clustered system across multiple machines, distributing data and computation for extreme scale. Vertica powers petabyte-scale analytics at organizations like Comcast, Netflix, and major financial institutions. It's particularly strong for historical data analysis, complex aggregations, and time-series queries. Unlike newer cloud data warehouses (Snowflake), Vertica offers control, customization, and predictable costs for large-scale operations.