DataFrame vs. Spark SQL

[SamAWS]

When should I use DataFrame over Spark SQL?

If DataFrame is better, then why do I need Spark SQL?

[shan_chandra]

@SamAWS - when you want to query the underlying data in the dataframe by creating a view or table, Spark SQL is preferred. Same can be achieved using pyspark by retaining them as a dataframe. Spark SQL is used by wider audience and easy to develop. 

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