Slide 4
Slide 4 text
4QBSL42-FYBNQMF
val sqlContext = new org.apache.spark.sql.SQLContext(sc)
import sqlContext.implicits._
case class Person(name: String, age: Int)
val people = sc.textFile("examples/src/main/resources/people.txt")
.map(_.split(",")).map(p => Person(p(0), p(1).trim.toInt)).toDF()
people.registerTempTable("people")
val teenagers = sqlContext
.sql("SELECT name, age FROM people WHERE age >= 13 AND age <= 19")
teenagers.map(
t => "Name: " + t.getAs[String]("name")
).collect().foreach(println)