As a data engineer, you are given a table named `stores` that contains a column named `city`, which holds string values representing the names of cities. You need to apply some custom logic to the `city` column as part of a specific data processing use case. To implement this custom logic efficiently across the dataset within Databricks, you want to create a SQL user-defined function (UDF). Which of the following code blocks will allow you to create this SQL UDF?

Exam-Like

CREATE FUNCTION custom_logic(city STRING) RETURNS STRING BEGIN RETURN UPPER(city); END;_

58.1%

CREATE UDF custom_logic(city STRING) RETURNS STRING BEGIN RETURN UPPER(city); END;_

6.5%

CREATE FUNCTION UDF custom_logic(city STRING) RETURNS STRING BEGIN RETURN UPPER(city); END;_

7.9%

CREATE FUNCTION custom_logic(city STRING) RETURNS CASE WHEN city IS NOT NULL THEN UPPER(city) ELSE city END;_

20.3%

CREATE UDF custom_logic(city STRING) RETURNS CASE WHEN city IS NOT NULL THEN UPPER(city) ELSE city END;_

7.3%

Databricks Certified Data Engineer - Associate