問題タブ [unfold]
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sql - SQL - Impala - How to unfold one categorical column into many?
I have the following table :
I want to "unfold" or "dummify" the category column and fill them with the "number" column to obtain:
Is it possible to achieve this in SQL (Impala) ?
I found this question How to create dummy variable columns for thousands of categories in Google BigQuery?
However it seems a little bit complex and I'd rather do it in Pandas.
Is there a simpler solution, knowing that I have 10 categories (A, B, C, D etc)?