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Definition · data warehousing

Data mart

Data mart is a subject-specific subset of a data warehouse scoped to a single team or function, such as finance or sales, for focused reporting. For data mart, a useful definition states a subject-specific subset of a data warehouse scoped to a single team or function, such as finance or, who owns it, and which decision it supports.

Also known as departmental data mart

Written by Pluvo TeamReviewed by Pluvo Team
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Why it matters

Understanding data mart matters because leaders need a shared, source-backed meaning before they can compare results, explain performance, or decide what to do next. When the term is tied to a source system, owner, and review cadence, it becomes easier to audit assumptions, catch changes early, and keep operators aligned.

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In practice

  • Operating example

    Data mart is useful when teams need a shared interpretation of a subject-specific subset of a data warehouse scoped to a single team or function, such as finance or sales, for focused reporting. The definition should make source data, timing, ownership, and the decision it supports explicit.

  • Review example

    Data mart should be reviewed whenever the source system, calculation logic, time period, or decision owner changes. That keeps the definition useful instead of letting it drift into a label.

In practice, teams should define data mart with a clear source, owner, time period, and decision before they use it in reporting, planning, or operating reviews.

Understanding data mart matters because leaders need a shared, source-backed meaning before they can compare results, explain performance, or decide what to do next. When the term is tied to a source system, owner, and review cadence, it becomes easier to audit assumptions, catch changes early, and keep operators aligned.

A strong workflow for data mart separates the definition from the action: first agree what the term means, then decide how it is measured, when it changes, and who is accountable for the next step.

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FAQ

What is a data mart?

Data mart is a subject-specific subset of a data warehouse scoped to a single team or function, such as finance or sales, for focused reporting. For data mart, a useful definition states a subject-specific subset of a data warehouse scoped to a single team or function, such as finance or, who owns it, and which decision it supports.

What is the difference between a data mart and a data warehouse?

The boundary for data mart differs from related terms by scope, source data, time period, and decision use. In this glossary, it covers a subject-specific subset of a data warehouse scoped to a single team or function, such as finance or sales, for focused reporting, so teams should compare those boundaries before using it in reporting or planning.

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Sources

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