Definition

dirty data

In a data warehouse, dirty data is a database record that contains errors. Dirty data can be caused by a number of factors including duplicate records, incomplete or outdated data, and the improper parsing of record fields from disparate systems. The Data Warehousing Institute (TDWI) estimates that dirty data costs U.S. businesses more than $600 billion each year.

Also see data quality.

Related glossary terms: correlation, customer relationship analysis (CRA), data-driven decision management (DDDM), customer valuation, Digital Silhouettes, PMML (Predictive Model Markup Language), data-driven disaster, real-time analytics, Plutchik's wheel of emotions , clickstream analysis

This was last updated in November 2005

Posted by: Margaret Rouse

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