多捧場的Pig Latin

Question

在HQL，我們有

JOIN weather ON (weather.Year = flight.Year AND weather.Month = flight.Month and weather.Day=flight.DayofMonth) 

在豬拉丁，是否有可能以適應它變成一個查詢？或者我必須單獨做並將它們結合起來？

Answer 1

它可能看到here：

您也可以加入多個鍵。在任何情況下，你必須有 相同的數字鍵，他們必須相同或兼容類型

的

例子：

weather = load '/weather/files/' as (Year,Month,Day,Fieldx); 
flight = load '/flight/files/' as (Year,Month,Day,Fieldy); 
jnd = join weather by (Year,Month,Day), flight by (Year,Month,Day);