June 2020
Intermediate to advanced
576 pages
15h 41m
English
Content preview from Spark in Action, Second Edition
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Appendix Q. Reference for exporting data
You can use this appendix as a reference for all-things-export: main formats, options for Parquet, CSV, JSON, and more. Because you will need to export data in Spark, this appendix will be very useful. It has some similarities with appendix L (for ingestion). The content is aggregated from several web pages, providing an easy one-stop shop for all developers.
The general syntax for exporting data is illustrated in figure Q.1.
Figure Q.1 General syntax for exporting data from a dataframe, with format, option, and mode
Q.1 Specifying the way to save data
Spark supports numerous saving modes ( SaveMode
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