nPath Resultの例4: ある行の値と次の行の値との結合 - Teradata Database - Teradata Vantage NewSQL Engine

入力

入力テーブルは、nPath Filterの例にあるようにクリックストリームです。

SQL呼び出し

SELECT * FROM nPath (
  ON clickstream PARTITION BY userid ORDER BY userid, sessionid, clicktime
  USING
  Mode (OVERLAPPING)
  Pattern ('A.B')
  Symbols (TRUE AS A, TRUE AS B)
  Result (
    FIRST (sessionid OF A) AS sessionid,
    FIRST (pagetype OF A) AS pageid,
    FIRST (pagetype OF B) AS next_pageid
  )
) ORDER BY sessionid;

出力