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.
Questo esercizio fa parte del corso
Time Series Analysis in PostgreSQL
Istruzioni dell'esercizio
- Use a window function to find the running average for
t_monthly_minacross various time series.
esercizio interattivo pratico
Prova questo esercizio completando questo codice di esempio.
-- 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;