What a data mart is
A data mart is a smaller, focused version of a data warehouse, concentrating on a particular subject area or the needs of a specific team or department. While a data warehouse holds a broad collection of an organization's data, a data mart narrows the focus to just the data relevant to one area, such as sales or marketing. This makes it simpler and more tailored to its users.
A focused subset
The defining feature of a data mart is its focus. Rather than trying to serve the whole organization, it serves a specific group or purpose, holding only the data that group needs. This narrower scope makes a data mart easier to understand and work with for its intended users, since it is not cluttered with data that is irrelevant to their particular area.
Data marts and warehouses
Data marts are closely related to data warehouses. A data mart can be thought of as a slice of a larger warehouse, drawing on the organization's data but presenting a focused portion of it. In some setups, data marts are built from a central warehouse; in others, they are created more independently. Either way, they serve the goal of giving specific teams convenient access to relevant data.
Why data marts are useful
Data marts are useful because they make relevant data easier and faster to access for a specific group. By narrowing the scope, they reduce complexity and can improve performance for that group's queries, since there is less data to sift through. They also let a team work with data tailored to their needs without navigating the entire organization's data warehouse.
Where data marts fit
Data marts fit into the broader world of data warehousing and business intelligence. They provide a practical way to deliver focused, department-level access to data for analysis and reporting. Within an organization's overall data strategy, data marts complement the data warehouse by serving the specific analytical needs of individual teams or subject areas.
Why it matters
Data marts offer a focused, practical way to give teams access to the data they need. Understanding what a data mart is - a smaller, subject-focused subset of a data warehouse - clarifies how organizations make large data stores usable for specific groups. For anyone interested in data and analytics, it is a useful concept to understand.
Related on Skillo
See also: What is a data warehouse? Explained, What is business intelligence? Explained.
Sources
Published date reflects the original event date (2024-04-16). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.
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