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DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #64

Which of the following code blocks fails to return a new DataFrame that is the result of an inner join between DataFrame storesDF and DataFrame employeesDF on column storeId and column employeeId?

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Spark SQL and DataFrame Operations

Question

Which of the following code blocks fails to return a new DataFrame that is the result of an inner join between DataFrame storesDF and DataFrame employeesDF on column storeId and column employeeId?

Options

  • AstoresDF.join(employeesDF, Seq(col("storeId"), col("employeeId")))
  • BstoresDF.join(employeesDF, Seq("storeId", "employeeId"))
  • CstoresDF.join(employeesDF, storesDF("storeId") === employeesDF("storeId") and
  • DstoresDF.join(employeesDF, Seq("storeId", "employeeId"), "inner")
  • EstoresDF.alias("s").join(employeesDF.alias("e"), col("s.storeId") === col("e.storeId") and

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Topics

#DataFrame Joins#Column References#Join API Syntax#Spark SQL
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