nPath Range-Matching Example | Teradata Vantage - nPath Range-Matching Example: Find Sessions That Start at Home Page and Visit Page1 - Teradata VantageCloud Lake

Input

The input table is aggregate_clicks, from LAG and LEAD Expressions Example: No Alias for Input Query.

SQL-MapReduce Call

SELECT * FROM nPath (
  ON aggregate_clicks PARTITION BY sessionid ORDER BY clicktime
  USING
  Mode (NONOVERLAPPING)
  Pattern ('^H.A*.P1.A*')
  Symbols (pagetype='home' AS H, pagetype='page1' AS P1, TRUE AS A)
  Result (
    FIRST (sessionid OF A) AS sessionid,
    ACCUMULATE (pagetype OF ANY(H,P1,A)) AS path
  )
) AS dt ORDER BY dt.sessionid;

Output