Creating a Function to Combine Data from Multiple Sources in Power BI

This guide explains how to create a custom function in Power BI to combine data from two different sources, such as SharePoint and Excel. The function utilizes the Power Query Editor and ensures that it can be refreshed in Power BI Services without errors. The guide provides step-by-step instructions, including importing necessary libraries, defining the function with comprehensive documentation, implementing input validation, connecting to data sources, performing data transformations, merging the data, and setting up refresh capabilities. An example implementation in Power BI's M language is provided, along with a usage example.