Multi-Column Null Validation

How can we filter records ensuring that mandatory primary and foreign key columns contain no null values?

Advanced⏱ 3 Minutes⭐ 800 XP

🤔 THE QUESTION

How can we filter records ensuring that mandatory primary and foreign key columns contain no null values?

💡 WHAT IS IT?

Combining isNotNull() predicates across critical business keys guarantees referential integrity at ingestion.

🎯 WHAT IS IT USED FOR?

Enforcing required fields before loading data into relational warehouse star schemas.

💻 EXAMPLE

df_valid_keys = df.filter(col("customer_id").isNotNull() & col("order_id").isNotNull() & col("store_id").isNotNull())

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