click_stream_links.txt

http://recsys.yoochoose.net/index.html
https://github.com/g-rutter/Clikistreams
https://github.com/opencypher/cypher-for-apache-spark
http://tinkerpop.apache.org/docs/current/reference/#sparkgraphcomputer
https://github.com/apache/tinkerpop/tree/master/spark-gremlin
https://github.com/datastax/graph-examples
https://www.datastax.com/dev/blog/dse-graph-frame
https://neo4j.com/docs/cypher-refcard/current/

https://developer.teradata.com/aster/articles/aster-npath-guide
 SELECT * 
  FROM NPATH ( 
    ON aggregate_clicks 
    PARTITION BY sessionid 
    ORDER BY clicktime ASC 
    MODE ( NONOVERLAPPING ) 
    PATTERN ( 'H+.D*.X*.P1.P2+' ) 
    SYMBOLS ( 'true' AS X, 
              pagetype = 'home' AS H, 
              pagetype <> 'home' AND pagetype <> 'checkout' AS D, 
              pagetype = 'checkout' AS P1, 
              pagetype = 'checkout' AND productprice > 100 AND productprice > LAG (productprice, 1, 100::REAL ) AS P2 
            ) 
    RESULT ( 
             FIRST ( productprice OF P1 ) AS first_product, 
             MAX_CHOOSE ( productprice, productname OF P2 ) AS max_product, 
             FIRST ( sessionid OF P2 ) AS sessionid 
           ) 
    )