Understanding the Importance of Database Indexing

AWS Athena explained in 2 minutes 💡 Imagine running SQL queries directly on your S3 files without ever setting up a database or managing servers. That's exactly what Amazon Athena does. It's a serverless query engine that lets you analyze raw logs, CSVs, and parquet files sitting in S3 using simple SQL commands. You define your data schema once, point Athena to your S3 bucket, and start querying immediately. The best part? You only pay for the data you actually scan, and there's zero infrastruc