November 2017
Beginner to intermediate
290 pages
7h 34m
English
book
Learning Apache Apex
by Ananth Gundabattula, Thomas Weise, Munagala V. Ramanath, David Yan, Kenneth Knowles
Content preview from Learning Apache Apex
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SQL
SQL is widely used for data transformation and access, not only with traditional relational databases but also in the Apache big data space with projects like Hive, Drill, Impala, and several others. They all let the user process bounded data at rest using familiar SQL syntax without requiring other programming skills. SQL can be used for ETL purposes but the most common use is for querying data, either directly or through the wide range of SQL compatible BI tools.
Though it has been in use in the Hadoop space for years, SQL is relatively new in the stream processing area as a declarative approach to specify a streaming application. Apex is using Apache Calcite for its SQL support, which has already been adopted by many other big data ...
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