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Spark SQL TutorialSpark SQL is a relational query expression that supports the use of SQL, Hivesql, and Scala in Spark. Its core component is a new RDD type, Schemardd, which uses a schema to describe the data type of all the columns in the row, which is like a table in a relational database. It can be created from an existing RDD, or it can be a parquet file, and most importantly it can support reading dat

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