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PredictAssociation (DMX)

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

Predicts associative membership.

Note Note

This is different from creating a prediction on an association model.

PredictAssociation(<table column reference>, option1, option2, n ...)

Classification algorithms and clustering algorithms that contain predictable nested tables. Classification algorithms include the Microsoft Decision Trees, Microsoft Naive Bayes, and Microsoft Neural Network algorithms.

<table expression>

The options for the PredictAssociation function include EXCLUDE_NULL, INCLUDE_NULL, INCLUSIVE, EXCLUSIVE (default), INPUT_ONLY, INCLUDE_STATISTICS, and INCLUDE_NODE_ID.

Note Note

INCLUSIVE, EXCLUSIVE, INPUT_ONLY, and INCLUDE_STATISTICS apply only for a table column reference, and EXCLUDE_NULL and INCLUDE_NULL apply only for a scalar column reference.

INCLUDE_STATISTICS only returns $Probability and $AdjustedProbability.

If the numeric parameter n is specified, the PredictAssociation function returns the top n most likely values based on the probability:

PredictAssociation(colref, [$AdjustedProbability], n)

If you include $AdjustedProbability, the statement returns the top n values based on the $AdjustedProbability.

The following example uses the PredictAssociation function to return the four products in the Adventure Works database that are most likely to be sold together.

SELECT
  PredictAssociation([Association].[v Assoc Seq Line Items],4)
From
  [Association]
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