What kind of data would typically be stored in a data warehouse?

The concept of a data warehouse is centered around the integration and storage of data from multiple, diverse sources. This data can come from transactional systems, operational databases, flat files, and external sources, creating a consolidated repository aimed at analytics and reporting.

The purpose of a data warehouse is to support business intelligence activities such as querying, reporting, and data analysis, which requires access to historical and current data across different formats and organizational silos. This makes it evident that data warehouses contain a variety of data types—both structured and unstructured—and not just a single type or from a single source.

In contrast to the other options, a data warehouse does not limit itself to real-time transaction data, which typically resides in operational databases, nor does it focus solely on confidential employee information or restrict data exclusively to structured financial information. Instead, it aims to serve as a comprehensive repository that can inform decision-making processes across an organization.