Skip Headers
Oracle® Database SQL Reference
10g Release 2 (10.2)

Part Number B14200-01
Go to Documentation Home
Home
Go to Book List
Book List
Go to Table of Contents
Contents
Go to Index
Index
Go to Master Index
Master Index
Go to Feedback page
Feedback

Go to previous page
Previous
Go to next page
Next
View PDF

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.