Athena

• Serverless query service to perform analytics on S3
• Uses SQL language to query the files
• Runs directly on S3 (no copying needed)
• Output stored in S3
• Built on Presto engine
• Supports CSV, JSON, ORC, AVI and Parquet file formats

Use compressed or columnar data for cost-savings (due to less scan)

Can be used along with AWS Transcribe (automatic speech recognition service that converts audio to text) to analyze audio for sentiment analysis.