These are the Top 5 Most Common SQL Questions for Data Engineering:


1. Total records after joining two tables on all types of joins
2. Rolling Sum and Nth salary based questions
3. Lag/Lead based questions e.g., consecutive months of increasing sales or YoY growth
4. Query to find employees who earn more than their managers
5. Removing duplicates from a table


Key Takeaways:
- Master window functions and joins
- Practice medium to hard SQL questions regularly

Getting good at SQL will pay off in the long run! 💪

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