A WS Athena is a schema on read platform. Now Athena is one of best services in AWS to build a Data Lake solutions and do analytics on flat files which are stored in the S3. In the backend its actually using presto clusters. So most of the Presto functions are support and you can use native SQL query to query your data. You can create partitions to speedup your query and reduce the cost for scanning. Here Im gonna explain automatically create AWS Athena partitions for cloudtrail between two dates. When it is introduced I used this for analyze CloudTrail Logs which was very helpful to get some particular activities like who launched this instance, track a particular user’s activity and etc.