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Aggregation Queries in Apache Hive | Apache Hive

August 13, 2020mtarek Apache Hive, Data Engineering

Introduction Data aggregation is the process of gathering and expressing data in a summary to get more information about particular groups based on specific conditions. HiveQL offers several built-in aggregate functions, such as max, min, avg,..etc. It also supports advanced aggregation using keywords such as Variance and Standard Deviation and different types of window functions. […]

Apache Hive Table Types | Apache Hive

July 10, 2020mtarek Apache Hive, Big Data, Data Engineering

Apache Hive is designed to give data engineers and data scientists a SQL like access to the big data available in the Hadoop cluster, so we can think of it as a normal RDBMS, in normal RDBMS we have a database, and tables, in Hive we have the same except in Hive we have two […]

Introduction to Hive | Apache Hive

July 5, 2020mtarek Apache Hive, Big Data

Hive was initially developed by Facebook in 2007 to help the company handle massive amounts of new data. At the time Hive was created, Facebook had a 15TB dataset they needed to work with. A few short years later, that data had grown to 700TB. Their RDBMS data warehouse was taking too long to process […]

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