|Oracle® Database SQL Language Reference
11g Release 2 (11.2)
|PDF · Mobi · ePub|
This function is for use with classification models created by the
DBMS_DATA_MINING package or with Oracle Data Miner. It is not valid with other types of models. It returns the probability for a given prediction as an Oracle
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.
mining_attribute_clause behaves as described for the
PREDICTION function. Refer to mining_attribute_clause.
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.