Spark生成静态DataSet

 val spark = SparkSession.builder
  .master("local[*]")
  .appName("testApp")
  .config("spark.sql.warehouse.dir", "file:///c:/tmp/spark-warehouse")
  .getOrCreate()

import spark.implicits._

val ds = Seq(("99227100", "42222245", "2018-04-26"),
  ("99227100", "42222245", "2018-05-01"),
  ("34011381", "42830849", "2015-12-20"),
  ("34011381", "42830849", "2016-11-27"),
  ("34011381", "42830849", "2016-12-19"),
  ("34011381", "42830849", "2017-08-05")).toDS()

//.toDF("ckey", "twkey", "s_date")

ds.show()