You can now query Delta Lake tables seamlessly in Amazon Athena, giving you the benefit of increased operational efficiency, improved query performance and reduced cost. Delta Lake is an open-source table format that helps implement modern data lake architectures commonly built on Amazon S3. Prior to this launch, reading Delta Lake tables in Athena required a complex process of generating and managing additional metadata files. Now you can use Athena to query Delta Lake tables directly without this additional effort.
Source:: Amazon AWS