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罗祥 2019-06-04 17:28:40 +08:00
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notes/Spark_Structured_API的基本使用.md
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@ -69,7 +69,7 @@ caseClassDS.show()
### 1.3 由RDD创建DataFrame ### 1.3 由RDD创建DataFrame
Spark支持两种方式把RDD转换为DataFrame，分别是使用反射推断和指定Schema转换。 Spark支持两种方式把RDD转换为DataFrame，分别是使用反射推断和指定Schema转换：
#### 1. 使用反射推断 #### 1. 使用反射推断
@ -241,4 +241,4 @@ spark.sql("SELECT ename,job FROM global_temp.gemp").show()
## 参考资料 ## 参考资料
[Spark SQL, DataFrames and Datasets Guide > Getting Started](https://spark.apache.org/docs/latest/sql-getting-started.html) [Spark SQL, DataFrames and Datasets Guide > Getting Started](https://spark.apache.org/docs/latest/sql-getting-started.html)