Definition · data modeling
Dimension table
Dimension table is a table in a dimensional model that holds the descriptive context, such as customer, product, or date, used to filter and group the facts. For dimension table, a useful definition states a table in a dimensional model that holds the descriptive context, such as customer, product, or date, used, who owns it, and which decision it supports.
Also known as dimension tables, lookup table
Why it matters
Understanding dimension table 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.
In practice
Operating example
Dimension table is useful when teams need a shared interpretation of a table in a dimensional model that holds the descriptive context, such as customer, product, or date, used to filter and group the facts. The definition should make source data, timing, ownership, and the decision it supports explicit.
Review example
Dimension table 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 dimension table with a clear source, owner, time period, and decision before they use it in reporting, planning, or operating reviews.
Understanding dimension table 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 dimension table 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.
FAQ
What is a dimension table?
Dimension table is a table in a dimensional model that holds the descriptive context, such as customer, product, or date, used to filter and group the facts. For dimension table, a useful definition states a table in a dimensional model that holds the descriptive context, such as customer, product, or date, used, who owns it, and which decision it supports.
What is the difference between a dimension table and a fact table?
The boundary for dimension table differs from related terms by scope, source data, time period, and decision use. In this glossary, it covers a table in a dimensional model that holds the descriptive context, such as customer, product, or date, used to filter and group the facts, so teams should compare those boundaries before using it in reporting or planning.