Aggregate data

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In statistics, aggregate data describes data combined from several measurements. When data are aggregated, groups of observations are replaced with summary statistics based on those observations.[1]

In a Data Warehouse, aggregate data dramatically reduces the time to query large sets of data. Developers pre-summarize queries that are regularly used, such as Weekly Sales across several Dimensions such as by Item Hierarchy or Geographical Hierarchy.

In economics, aggregate data or data aggregates describes high-level data that is composed from a multitude or combination of other more individual data.

See also[edit]

References[edit]

  1. ^ Aggregation and Restructuring of data (chapter 5.6 from the book "R in Action", Manning Publications)