Aggregating temperature data
As a data scientist on a research project studying climate cycles you are analyzing how much the monthly high and low temperatures vary over time.
You are interested in the difference between the maximum-minimum monthly temperature and the minimum-minimum monthly temperature, and in the metric for the monthly max temperatures. You call these min_spread and max_spread respectively:
min_spread: maximum minimum monthly temperature - the minimum minimum monthly temperaturemax_spread: maximum maximum monthly temperature - the minimum maximum monthly temperature
You will first aggregate these two metrics on an overall basis. Then, you will aggregate by location and look at the variation by season.
temperature_stations and temperatures_monthly are available to you.
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Time Series Analysis in PostgreSQL
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-- Calculate the overall min_spread and max_spread
SELECT
___ AS min_spread,
___ AS max_spread
FROM ___;