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Oracle® Database SQL Language Reference
11g Release 1 (11.1)

B28286-07
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CLUSTER_PROBABILITY

Syntax

Description of cluster_probability.gif follows
Description of the illustration cluster_probability.gif

mining_attribute_clause::=

Description of mining_attribute_clause.gif follows
Description of the illustration mining_attribute_clause.gif

Purpose

This function is for use with clustering models that have been created with the DBMS_DATA_MINING package or with the Oracle Data Mining Java API. It returns a measure of the degree of confidence of membership of an input row in a cluster associated with the specified model.

See Also:

Examples

The following example determines the ten most representative customers, based on likelihood, in cluster 2.

This example, and the prerequisite data mining operations, including the creation of the dm_sh_clus_sample model and the dm_sh_sample_apply_prepared view, can be found in the demo file $ORACLE_HOME/rdbms/demo/dmkmdemo.sql. General information on data mining demo files is available in Oracle Data Mining Administrator's Guide. The example is presented here to illustrate the syntactic use of the function.

SELECT *
  FROM (SELECT cust_id, CLUSTER_PROBABILITY(km_sh_clus_sample, 2 USING *) prob
          FROM km_sh_sample_apply_prepared
        ORDER BY prob DESC)
 WHERE ROWNUM < 11;

   CUST_ID   PROB
---------- ------
    100052  .9993
    100962  .9993
    101208  .9993
    100281  .9993
    100012  .9993
    101009  .9992
    100173  .9992
    101176  .9991
    100672  .9991
    101420  .9991
 
10 rows selected.