Data Mart
A data mart is a subset of a data warehouse that is focused on a specific business line, department, or subject area, such as sales, finance, or marketing. It contains a curated collection of data optimized for analysis and reporting by a particular group of users, often structured in a star or snowflake schema. Data marts are designed to provide faster, more targeted access to relevant data compared to querying the entire data warehouse.
Developers should learn about data marts when building or maintaining business intelligence (BI) systems, as they enable efficient data analysis for specific teams by reducing complexity and improving query performance. Use cases include creating dashboards for sales teams to track performance, generating financial reports for accounting departments, or supporting marketing campaigns with customer insights. They are particularly valuable in large organizations where different departments have distinct data needs.