prestodb/presto

Presto is a distributed SQL query engine built for big data. SQL is the standard language used to ask questions of databases, like "show me all sales from last month." Presto's specialty is running those same SQL queries across enormous datasets that are spread across many machines, making it possible to analyze data at a scale that would overwhelm a traditional database. The key idea is "distributed", instead of one machine doing all the work, Presto splits a query across many servers working simultaneously. This makes it possible to query petabytes of data and get results in seconds or minutes rather than hours. It connects to many different data sources, including Hive and Hadoop-based data lakes, meaning organizations can query data wherever it lives without moving it first. The project is the official home of the Presto engine and is written in Java. It's used in enterprise environments where data engineering teams need to run analytical queries across large-scale data infrastructure. Topics associated with the project include big data, data lakes, Hive, and Hadoop, reflecting its positioning in the modern data warehouse ecosystem. Setting up Presto involves running a cluster of servers, a coordinator that receives queries and distributes work, plus worker nodes that do the actual processing. Once running, analysts and data scientists interact with it using standard SQL tools, asking questions of large datasets without needing to know how the distributed processing happens underneath.