June 2020
Intermediate to advanced
576 pages
15h 41m
English
Content preview from Spark in Action, Second Edition
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8. Ingestion from databases
This chapter covers
- Ingesting data from relational databases
- Understanding the role of dialects in communication between Spark and databases
- Building advanced queries in Spark to address the database prior to ingestion
- Understanding advanced communication with databases
- Ingesting from Elasticsearch
In the big data and enterprise context, relational databases are often the source of the data on which you will perform analytics. It makes sense to understand how to extract data from those databases, both through the whole table or through SQL SELECT statements.
In this chapter, you’ll learn several ways to ingest data from those relational databases, ingesting either the full table at once or asking the database to ...
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