Spark2 Dataset之視圖與SQL
// 創建視圖 data.createOrReplaceTempView("Affairs") val df1 = spark.sql("SELECT * FROM Affairs WHERE age BETWEEN 20 AND 25") df1 ...
原文：Spark2 Dataset多維度統計cube與rollup
val df spark.sql select gender,children,max age ,avg age ,count age from Affairs group by Cube gender,children order by , df .show gender children max age avg age count age null null . . null no . . ...
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