SPARK-SQL 基础应用入门1-sparkSession,Dataset,DataFrame,select,groupBy等
相关的测试数据和pojo类,查看博文https://blog.csdn.net/qq_41712271/article/details/107812188//导入相关的包importstaticorg.apache.spark.sql.functions.col;publicstaticvoidmain(String[]args){//0:sparksql程序入口SparkSessionspark