Amazon Athena is a query service that you can use to analyze data in Amazon Simple Storage Service (Amazon S3) by using the standard SQL. Amazon Athena executes multiple queries simultaneously, and fetches the result quickly even with large datasets and complex queries.
Amazon Athena helps you analyze unstructured, semi-structured, and structured data stored in Amazon S3.
Amazon Athena stores the schema in a data catalog or AWS Glue data catalog and uses it when you run queries. Amazon Athena uses Apache Hive to create tables and databases.