[b]"What’s the most efficient method for data retrieval in large datasets?"[/b] or [b]"How do you optimize data re

If speed is critical, consider approximate query processing (AQP). Tools like BlinkDB give you *good enough* results in a fraction of the time.

Sacrificing a bit of accuracy for performance is totally valid in some scenarios—like dashboards or real-time analytics.

NoSQL isn’t *always* the villain, but it’s easy to misuse. Maybe your schema design needs tweaking?