Hive Query Engine

Apache Hive is a SQL query engine for Hadoop and cloud data lakes. Instead of learning MapReduce, data engineers write SQL. Hive translates SQL to MapReduce/Spark jobs, runs them, returns results. Hive enables petabyte-scale analytics on cheap commodity hardware or cloud object storage (S3, ADLS). Typical use: monthly reports, cohort analysis, ETL jobs processing terabytes.