原文:[Spark][Python]DataFrame中取出有限個記錄的例子

Spark Python DataFrame中取出有限個記錄的例子: sqlContext HiveContext sc peopleDF sqlContext.read.json people.json peopleDF.limit .show training localhost hdfs dfs cat people.json name : Alice , pcode : name : B ...

2017-10-05 20:02 0 1074 推薦指數:

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[Spark][Python]DataFrame select 操作例子

[Spark][Python]DataFrame取出有限記錄例子 的 繼續 In [4]: peopleDF.select("age")Out[4]: DataFrame[age: bigint] In [5]: myDF=people.select("age")------------------------------------------------------------- ...

Fri Oct 06 04:11:00 CST 2017 0 3017
[Spark][Python]DataFrame where 操作例子

[Spark][Python]DataFrame取出有限記錄例子 的 繼續 [15]: myDF=peopleDF.where("age>21") In [16]: myDF.limit(2).show() +---+-------+-----+----+|age| name ...

Fri Oct 06 04:26:00 CST 2017 0 4921
[Spark][Python]DataFrame select 操作例子II

[Spark][Python]DataFrame取出有限記錄的 繼續 In [4]: peopleDF.select("age","name") In [11]: myDF=peopleDF.select("age","name") In [14]: myDF.limit ...

Fri Oct 06 04:16:00 CST 2017 0 2108
 
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