Ranking cold weather
You are working for the national weather agency for the US. Texas has been experiencing some unusually cold weather later and you have been tasked to analyze historical data and rank the coldest temperatures.
Rank the TX weather station data by t_monthly_min. Rank 1 should appear first and have the lowest temperature. Temperatures that are the same should have the same rank.
You will need to join temperatures_monthly and temperature_stations.
Questo esercizio fa parte del corso
Time Series Analysis in PostgreSQL
Istruzioni dell'esercizio
- Rank
t_monthly_minfor theTXweather station by joining the two tables and partitioning bystation_id; rank1should have the lowest temperature.
Esercizio pratico interattivo
Prova a risolvere questo esercizio completando il codice di esempio.
-- Rank the lowest temperatures in Texas
SELECT
ts.state,
year_month,
t_monthly_min,
___ (
___
___) AS rank
FROM temperatures_monthly AS tm
___ AS ts
USING(___)
___
ORDER BY rank;