Multi running average
The team leader was very impressed with your work getting the running average for Hawaii. They have now decided they need the running average of lowest monthly temperatures across all stations. Luckily, you know how to do to this quickly.
Este exercício faz parte do curso
Time Series Analysis in PostgreSQL
Instruções do exercício
- Use a window function to find the running average for
t_monthly_minacross various time series.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
-- Calculate the running average of the lowest temperates for all stations
SELECT
ts.state,
year_month,
t_monthly_min,
___ AS running_avg_temp
FROM temperatures_monthly AS tm
JOIN temperature_stations AS ts
USING(station_id)
ORDER BY ts.state, year_month;