参考:https://spark.apache.org/docs/latest/sql-programming-guide.html#overview http://www.csdn.net/article/2015-04-03/2824407 Spark SQL is a Spark module for structured data processing. It provides a programming abstraction called DataFrames and can als…
 Spark SQL Example This example demonstrates how to use sqlContext.sql to create and load a table and select rows from the table into a DataFrame. The next steps use the DataFrame API to filter the rows for salaries greater than 150,000 and show th…
通过Spark SQL External Data Sources JDBC实现将RDD的数据写入到MySQL数据库中. jdbc.scala重要API介绍: /** * Save this RDD to a JDBC database at `url` under the table name `table`. * This will run a `CREATE TABLE` and a bunch of `INSERT INTO` statements. * If you pass `tru…