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更新しました 2024/11/01
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json_object_keys
Applies to: Databricks SQL Databricks Runtime
Returns all the keys of the outermost JSON object as an array.
json_object_keys(jsonObject)
jsonObject: A STRING expression of a valid JSON array format.
jsonObject
An ARRAY < STRING >.
If ‘jsonObject’ is any other valid JSON string, an invalid JSON string or an empty string, the function returns NULL.
> SELECT json_object_keys('{}'); [] > SELECT json_object_keys('{"key": "value"}'); [key] > SELECT json_object_keys('{"f1":"abc","f2":{"f3":"a", "f4":"b"}}'); [f1,f2]
: operator
json_array_length function
json_tuple table-valued generator function
from_json function
get_json_object function
schema_of_json function
to_json function