FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A data mart is a subset of a data warehouse focused on a particular line of business, department, or subject area. Data marts make specific data available to a defined group of users, which allows those users to quickly access critical insights without wasting time searching through an entire data warehouse.

Detailed explanation-2: -Size:a data mart is typically less than 100 GB; a data warehouse is typically larger than 100 GB and often a terabyte or more. Range: a data mart is limited to a single focus for one line of business; a data warehouse is typically enterprise-wide and ranges across multiple areas.

Detailed explanation-3: -Data marts contain repositories of summarized data collected for analysis on a specific section or unit within an organization, for example, the sales department. A data warehouse is a large centralized repository of data that contains information from many sources within an organization.

Detailed explanation-4: -A data warehouse is a central repository of information that can be analyzed to make more informed decisions. Data flows into a data warehouse from transactional systems, relational databases, and other sources, typically on a regular cadence.

Detailed explanation-5: -A data mart is similar to a data warehouse, but it holds data only for a specific department or line of business, such as sales, finance, or human resources. A data warehouse can feed data to a data mart, or a data mart can feed a data warehouse.