Merge Query in Power BI is one of the two primary methods of combining queries. The other being Append Queries. While Merge Query is used inside Power BI, to help you add one or more columns to another query of your choice. Wish to break into the BI industry with Power BI skillset? Then check out the Power BI certification course, from Intellipaat, which offers you instructor-led courses and guided projects that will help you enhance practical skills. Also, watch the following video on Learn Power BI.