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Aggregate data

From Wikipedia, the free encyclopedia

In statistics, aggregate data are 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, the use of 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 are high-level data that are composed from a multitude or combination of other more individual data, such as:

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  • ✪ How to aggregate data in SPSS (Data Aggregation)
  • ✪ The Aggregate Function in SPSS
  • ✪ Aggregate data

Transcription

References

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


This page was last edited on 7 February 2019, at 00:42
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