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PYSPARK • LESSON 93

Joining on Single Column Key

How do we perform a concise natural join on a single shared product_id column without duplicate key columns?

Intermediate2 Minutes450 XP
🤔 THE QUESTION

How do we perform a concise natural join on a single shared product_id column without duplicate key columns?

💡 WHAT IS IT?

Passing a string column name into join() automatically coalesces the join key into a single output column.

🎯 WHAT IS IT USED FOR?

Product catalog lookups, dimension table joins, and eliminating duplicate key columns in output schemas.

💻 EXAMPLE
df = orders.join(products, "product_id")

🎯 Mission Objectives

Practice typing production-grade PySpark code for Joining on Single Column Key.

  • Join on string column key
  • Prevent duplicate key columns in output
  • Enrich orders with product attributes