Use for questions about how to use Amazon Presto SQL query engine on Amazon EMR.

Taken from the docs for Prest:

Presto on Amazon EMR is a SQL query engine optimized for low-latency, ad-hoc analysis of data. It supports the ANSI SQL standard, including complex queries, aggregations, joins, and window functions. Presto can process data from multiple data sources including the Hadoop Distributed File System (HDFS) and Amazon S3.