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

Database Analytic Functions

Product
Teradata® Database
Release Number
17.10
Published
July 2021
Language
English (United States)
Last Update
2021-07-28
dita:mapPath
Teradata_Vantage™___Advanced_SQL_Engine_Analytic_Functions.withLogo_upload_July2021/wnd1589838592459.ditamap
dita:ditavalPath
Teradata_Vantage™___Advanced_SQL_Engine_Analytic_Functions.withLogo_upload_July2021/ayr1485454803741.ditaval
dita:id
B035-1206
lifecycle
previous
Product Category
Teradata Vantage™

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

sessionid path
1 [home, home1, page1, home, home1, page1, home, home, home, home1, page1, checkout, home, home, home, home, home, home, home, home, home]
2 [home, home, home, home, home, home, home, home, home, home1, page1, checkout, checkout, home, home]
3 [home, home, home, home, home, home, home, home, home1, page1, home, home1, page1, home]
4 [home, home, home, home, home, home, home1, home1, home1, page1, page1, page1]
5 [home, home, home, home, home1, home1, home1, page1, page1, page1, page2, page2, page2, checkout, checkout, checkout, page2, page2, page2]