PySpark and AWS: Master Big Data with PySpark and AWS - Project (UDF and WithColumn)

The video tutorial explains how to create and use a User Defined Function (UDF) to increase the salary of employees over the age of 45 by $500. It covers the steps to define the UDF, implement the logic to check the age condition, register the UDF, and apply it to a data frame to update the salary column. The tutorial emphasizes the importance of running the cell after modifications to ensure changes are applied.

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