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PYSPARK โ€ข 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?

Intermediateโฑ 2 Minutesโญ 450 XP
๐Ÿค” THE QUESTION

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

๐Ÿ’ก WHAT IS IT?

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

๐ŸŽฏ WHAT IS IT USED FOR?

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

๐Ÿ’ป EXAMPLE
df = orders.join(products, "product_id")

๐ŸŽฏ Mission Objectives

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

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