Advanced Challenges
Test your skills with complex real-world data transformation scenarios.
Challenge 1: Order Summary Report
Challenge 2: Normalize API Response
Challenge 3: Multi-Level Grouping
Challenge 4: Time Series Aggregation
Challenge 5: Deep Merge
Challenge 6: Find Duplicates
Challenge 7: Tree to Flat List
Challenge 8: Pipeline Processing
Free Practice
Build your own complex transformations: