When would you use a function?

Using a function is particularly beneficial when you need to define complex data sources for your calculation view that require conditional logic. Functions allow for the encapsulation of complex business logic, enabling you to use parameters and return values that can provide dynamic outcomes based on the input received. This functionality is crucial in scenarios where calculations or data transformations depend on certain conditions or criteria, thereby enhancing the flexibility and maintainability of your analytic models.

By incorporating functions, you can streamline your logic, reduce redundancy, and ensure that modifications can be easily applied to the function instead of altering multiple parts of your SQL code. This leads to clearer, more organized code that reflects the complex relationships and calculations needed in your data model, ultimately supporting a more sophisticated analytic approach.