PREDICTION_PROBABILITY
Description of the illustration prediction_probability.gif
Description of the illustration mining_attribute_clause.gif
This function is for use with classification models created by the DBMS_DATA_MINING package or with the Oracle Data Mining Java API. It is not valid with other types of models. It returns the probability for a given prediction as an Oracle NUMBER.
If you specify the optional class parameter, then the function returns the probability for the specified class. This is equivalent to the probability associated with choosing the given target class value.
If you omit the class parameter, then the function returns the probability associated with the best prediction. You can use this form in conjunction with the PREDICTION function to obtain the best pair of prediction value and probability.
The mining_attribute_clause behaves as described for the PREDICTION function. Please refer to mining_attribute_clause.
See Also:
-
Oracle Data Mining Concepts for detailed information on Oracle Data Mining features
-
Oracle Data Mining Administrator's Guide for information on the demo programs available in the code
-
Oracle Data Mining Application Developer's Guide for information on writing Oracle Data Mining applications
The following example returns the 10 customers living in Italy who are most likely to use an affinity card.
This example, and the prerequisite data mining operations, including the creation of the view, can be found in the demo files $ORACLE_HOME/rdbms/demo/dmdtdemo.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 cust_id FROM (
SELECT cust_id
FROM mining_data_apply_v
WHERE country_name = 'Italy'
ORDER BY PREDICTION_PROBABILITY(DT_SH_Clas_sample, 1 USING *)
DESC, cust_id)
WHERE rownum < 11;
CUST_ID
----------
100081
100179
100185
100324
100344
100554
100662
100733
101250
101306
10 rows selected.