Data Cleaning

Data Cleaning

Zur Datenbereinigung (engl. data cleansing oder data scrubbing) gehören verschiedene Verfahren zum Entfernen und Korrigieren von Datenfehlern in Datenbanken oder anderen Informationssystemen. Die Fehler können beispielsweise aus inkorrekten (ursprünglich falschen oder veralteten), redundanten, inkonsistenten oder falsch formatierten Daten bestehen.

Wesentliche Schritte zur Datenbereinigung sind die Duplikaterkennung (Erkennen und Zusammenlegen von gleichen Datensätzen) und Datenfusion (Zusammenführen und Vervollständigen lückenhafter Daten).

Die Datenbereinigung ist ein Beitrag zur Verbesserung der Informationsqualität. Allerdings betrifft Informationsqualität auch viele weitere Eigenschaften von Datenquellen (Glaubwürdigkeit, Relevanz, Verfügbarkeit, Kosten...), die sich mittels Datenbereinigung nicht verbessern lassen.

Siehe auch


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