A data store created for management and reporting for a single business unit is commonly called a

• A. Data Mart
• B. Data Lake
• C. Data Warehouse
• D. Operational Data Store

Answer: (A)

A data mart is a data store focused on management and reporting for a single business unit. It collects and organizes the subset of data that this unit cares about, often derived from a larger enterprise source like a data warehouse, and structures it in a way that makes querying and reporting fast and easy for business users. This specialization helps the unit analyze its own performance, trends, and metrics without sifting through data that isn’t relevant to its goals.

In contrast, a data lake holds raw, diverse data in any format for broad analytics and data science, not tailored for quick, unit-specific reporting. A data warehouse serves the entire organization with integrated data for enterprise-wide analytics, not limited to one unit. An operational data store focuses on up-to-date data to support day-to-day operations and real-time queries rather than strategic management reporting.