Introduzione al Data Engineering
Vincent Vankrunkelsven
Data Engineer, DataCamp



SELECT year, AVG(age)
FROM views.athlete_events
GROUP BY year


.map() o .filter().count() o .first()
# Carica prima l'insieme di dati in athlete_events_spark
(athlete_events_spark
.groupBy('Year')
.mean('Age')
.show())
SELECT year, AVG(age)
FROM views.athlete_events
GROUP BY year
Introduzione al Data Engineering