Use MERGE (upsert) for safe, rerunnable data pipelines that handle duplicates gracefully.
Calculate running totals, rankings, and moving averages efficiently with SQL window functions.
Gradually replace legacy systems by routing traffic to new implementations incrementally.
Use domain events to decouple components and enable reactive architectures.
Share common code and dependencies across Lambda functions to reduce deployment size.
Prevent cascade failures by implementing circuit breaker pattern for external service calls.
