第44课：Spark 2.0编程实战之DataSet案例开发实战
people.json
{"name":"Michael"} {"name":"Andy", "age":30} {"name":"Justin", "age":19}
peopleScores.json
{"n":"Michael", "score":88}
{"n":"Andy", "score":100}
{"n":"Justin", "score":89}
运行结果
16/09/16 17:48:51 INFO CodeGenerator: Code generated in 13.484901 ms +---+----+----+-----+ |age|name| n|score| +---+----+----+-----+ | 30|Andy|Andy| 100| +---+----+----+-----
== Physical Plan == *HashAggregate(keys=[name#1], functions=[avg(score#25L), avg(age#0L)]) +- Exchange hashpartitioning(name#1, 200) +- *HashAggregate(keys=[name#1], functi
