June 2009
Beginner to intermediate
428 pages
9h 48m
German
Content preview from Data Mining mit Microsoft SQL Server
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16.3. Ausgewählte Tasks für Text Mining-Szenarien
Obwohl SQL Server Analysis Services keinen dezidierten Algorithmus für die Analyse von Texten bieten, werden Text Mining-Vorhaben dennoch unterstützt. Ermöglicht wird dies durch zwei SSIS-Tasks der Ablaufsteuerung. Mit diesen Tasks können Texte vorverarbeitet sowie in eine Struktur zur Analyse durch die zur Verfügung stehenden Data Mining-Algorithmen gebracht werden.
16.3.1. Ausdrucksextrahierungs-Task
Der Ausdrucksextrahierungs-Task ermöglicht das Finden von häufig vorkommenden Hauptwörtern innerhalb einer Textspalte. Dabei ist zu beachten, dass von diesem Task lediglich englischsprachige Texte unterstützt werden. In anderen Sprachen verfasste Texte sind somit manuell in Hinblick auf interessante ...
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