1.1 - 8.10 - FellegiSunter Example: Supervised Learning - Teradata Vantage

Teradata Vantage™ - Machine Learning Engine Analytic Function Reference

Product
Teradata Vantage
Release Number
1.1
8.10
Release Date
October 2019
Content Type
Programming Reference
Publication ID
B700-4003-079K
Language
English (United States)

The supervised model is created like the unsupervised model, except the syntax element TagColumn ('match_tag') specifies the data for the on which to train the model. Supervised learning does not use initialization parameters.

Input

SQL Call

CREATE MULTISET TABLE "fg_supervised_model" AS (
  SELECT * FROM FellegiSunter (
    ON fstrainer_input AS InputTable
    USING
    ComparisonFields ('jaro1_sim: 0.8', 'ld1_sim:0.8', 'ngram1_sim:0.5',
                      'jw1_sim:0.8')
    TagColumn ('match_tag')
  ) AS dt
) WITH DATA;

Output

This query returns the following table:

SELECT * FROM fg_supervised_model ORDER BY 1;
 _key                         _value             
 ---------------------------- ------------------ 
 comparison_filed_cnt         4                 
 comparison_filed_name_0      jaro1_sim         
 comparison_filed_name_1      ld1_sim           
 comparison_filed_name_2      ngram1_sim        
 comparison_filed_name_3      jw1_sim           
 comparison_filed_threshold_0 0.8               
 comparison_filed_threshold_1 0.8               
 comparison_filed_threshold_2 0.5               
 comparison_filed_threshold_3 0.8               
 is_supervised                true              
 lambda                       0.9               
 lower_bound                  -0.795859283219775
 mu                           0.9               
 m_0                          0.9999999         
 m_1                          0.2               
 m_2                          0.6               
 m_3                          0.9999999         
 time_used                    16.103000 seconds 
 upper_bound                  -0.795859283219775
 u_0                          0.666666666666667 
 u_1                          1.0E-7            
 u_2                          1.0E-7            
 u_3                          0.833333333333333

Download a zip file of all examples and a SQL script file that creates their input tables from the attachment in the left sidebar.