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SQL UDF in Python

What is a python UDF in SQL?

A SQL UDF (User-Defined Function) is a custom function that extends the capabilities of SQL by allowing users to implement complex logic and transformations that are not available with built-in SQL functions. This is important for feature engineering and model inference, as custom feature functions or inference pipelines can be written in a language like Python and can then be invoked from within a SQL query.

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