VectorDistance Example: Sparse I/O, Nondefault Thresholds | Teradata Vantage - VectorDistance Example: Sparse-Format Input and Output, Nondefault Thresholds - Teradata Vantage

Input

See VectorDistance Examples Sparse Input.

This example uses the MaxDistance syntax element to limit the output to target vectors within the specified distances for each measure.

SQL Call

SELECT * FROM VectorDistance (
  ON target_mobile_data as TargetTable PARTITION BY UserID
  ON ref_mobile_data as ReferenceTable DIMENSION
  USING
  TargetIdColumns ('UserID')
  TargetAttributeNameColumn ('Feature')
  TargetAttributeValueColumn ('value1')
  DistanceMeasure ('Cosine','Euclidean','Manhattan')
  MaxDistance (0.03,0.8,1.0)
) AS dt ORDER BY 1;

Output

Only UserID 2 and UserID 3 meet the threshold criteria.

 target_userid ref_userid type      distance             
 ------------- ---------- --------- -------------------- 
             2          5 manhattan                 0.73
             2          5 euclidean   0.5243090691567331
             2          5 cosine     0.02608922985452755
             3          5 manhattan                 0.67
             3          5 euclidean   0.4526588119102511
             3          5 cosine    0.024150544155866593

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