Extracting top level JSON keys
The Idaho field team is back at it again, they got a new weather station that is outputting JSON strings that they'd like you to get data out of for them. The JSON is in the CTE named weather_station for you to work with. It has the JSON string in the data column.
Diese Übung ist Teil des Kurses
Introduction to Redshift
Anleitung zur Übung
- Extract the
'date'value from thedataasweather_date. - Extract the
'weather'value from thedataasweather_state.
Interaktive Übung
Versuche dich an dieser Übung, indem du diesen Beispielcode vervollständigst.
-- weather_station CTE with the JSON in the data column
WITH weather_station AS (
SELECT '
{
"location": "Salmon Challis National Forest",
"date": "2024-02-10",
"weather": "Rainy",
"temperature": {
"current": 10,
"min": 8,
"max": 12,
"hourly_temperature": [8, 8, 9, 9, 10, 10, 11, 11, 12]
}
}'::SUPER::VARCHAR as data
-- Above line casts to SUPER and then to
-- VARCHAR to ensure it's ready for parsing
)
-- Extract the date value
SELECT ___(___, ___) AS ___,
-- Extract the weather value
___(___, ___) AS ___
-- Using the CTE
FROM ___;