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Where can I find a spark example code?

Find full example code at "examples/src/main/scala/org/apache/spark/examples/sql/SparkSQLExample.scala" in the Spark repo. Note: The default value of containsNull is true . Note: The default value of valueContainsNull is true .

Where can I find the code from the spark book?

This is the central repository for all materials related to Spark: The Definitive Guide by Bill Chambers and Matei Zaharia. This repository is currently a work in progress and new material will be added over time. You can find the code from the book in the code subfolder where it is broken down by language and chapter.

Does spark have a primary key?

spark do not have any concept of primary key. As spark is computation engine not database. There are new features coming in 2022. Follow below list: Unity catalog (seems that it will exists next to hive metastore and it will be possible to migrate) Notebooks UI: transformations wizards (like select, drop, groupby from droplist etc.)

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