Forward-Looking Analysis with lead()

How can we inspect a user's next action to determine navigation conversion pathways?

Advanced⏱ 3 Minutes⭐ 840 XP

🤔 THE QUESTION

How can we inspect a user's next action to determine navigation conversion pathways?

💡 WHAT IS IT?

lead('page_name', 1) fetches the subsequent row's page attribute without an expensive self-join.

🎯 WHAT IS IT USED FOR?

Website funnel drop-off analysis, customer churn path prediction, and clickstream pathway graphs.

💻 EXAMPLE

w = Window.partitionBy("user_id").orderBy("timestamp")
df_funnel = df.withColumn("next_page", lead("page_name", 1).over(w))

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