val trainingDataTable = sql("""
    SELECT e.action, u.age, u.latitude, u.longitude
    FROM Users u
    JOIN Events e
    ON u.userId = e.userId""")

// Since `sql` returns an RDD, the results can be easily used in MLlib
val trainingData = trainingDataTable.map { case Row(_, age, latitude, longitude) =>
  val features = Array[Double](age, latitude, longitude)
  LabeledPoint(age, features)
}
val model = new LogisticRegressionWithSGD().run(trainingData)