Calculate yearly average temperature
As a data analyst you may be called upon by a colleague to perform an ad hoc query that helps them perform their role more effectively or to help satisfy their curiosity about data that is important to them. In this scenario, you are a data scientist at a weather station. The weather station manager wants you to calculate the yearly average temperature for each weather station, by averaging the monthly average.
Cet exercice fait partie du cours
Time Series Analysis in PostgreSQL
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
-- Yearly average of monthly average temp for each station
SELECT
station_id,
-- Truncate year_month to year
___(___, year_month) AS year,
___(t_monthly_avg) AS yearly_avg
FROM temperatures_monthly
WHERE t_monthly_avg > -9999
GROUP BY station_id, year
ORDER BY station_id, year;