June 2009
Beginner to intermediate
428 pages
9h 48m
German
Content preview from Data Mining mit Microsoft SQL Server
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24.5. Weitere Abfragen für Miningmodelle
Neben den üblichen Abfragen zur Erstellung und Verwendung von Miningmodellen bietet DMX zahlreiche weitere Möglichkeiten, um mit Miningstrukturen und -modellen zu arbeiten. Einige häufig verwendete Abfragen sind in den folgenden Abschnitten aufgeführt. Eine vollständige Beschreibung von DMX finden Sie in der Onlinedokumentation.
24.5.1. Statistische Daten abfragen
Mit der einfachen Anweisung aus Listing 24.10 lassen sich statistische Daten zu einem Miningmodell abfragen. Kernstück der Anweisung ist die Funktion PredictHistogram, die für eine vorhersagbare Spalte die in Abbildung 24.7 dargestellte Statistik liefert.
Listing 24.10. Statistik zum Miningmodell mit DMX abfragen
SELECT PredictHistogram([Fahrradkaeufer]) ... |
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