SparkSql.pdf

xlyuming 12 0 PDF 2021-01-23 13:01:02

Spark为结构化数据处理引入了一个称为Spark SQL的编程模块。它提供了一个称为DataFrame(数据框)的编程抽象,DF的底层仍然是RDD,并且可以充当分布式SQL查询引擎

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