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**Spark SQL :**
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1. [DateFrames 和 DataSets ](https://github.com/heibaiying/BigData-Notes/blob/master/notes/SparkSQL_Dataset和DataFrame简介.md)
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2. [Structured API的基本使用](https://github.com/heibaiying/BigData-Notes/blob/master/notes/Structured_API的基本使用.md)
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2. [Structured API的基本使用](https://github.com/heibaiying/BigData-Notes/blob/master/notes/Spark_Structured_API的基本使用.md)
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3. 外部数据源
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4. [Spark SQL常用聚合函数](https://github.com/heibaiying/BigData-Notes/blob/master/notes/SparkSQL常用聚合函数.md)
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5. 联结操作
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