6.Removing Duplicates in PySpark | Real-World & Interview Approach
Автор: DE Simplified
Загружено: 2025-12-19
Просмотров: 5
Описание:
Removing duplicates in PySpark is not just about using dropDuplicates.
In this video, we explain how to remove duplicates correctly using real-world logic and interview-oriented examples.
You will learn:
• What duplicates really mean in data engineering
• Exact duplicates vs business duplicates
• Why dropDuplicates can be dangerous
• Using window functions to remove duplicates correctly
• Entity vs event duplicates
• When to deduplicate vs when to aggregate
• Interview-ready explanation for duplicate handling
This tutorial uses one consistent dataset and is designed for beginners and working professionals preparing for PySpark and Data Engineering interviews.
Subscribe to DE Simplified for clean, real-world PySpark and Data Engineering tutorials.
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