I have the following table in Power BI and i am looking for a simple or easy way to sum across columns per row. For example, i have 3 columns to sum into a fourth column per row. But it becomes very complicated if i have 100's of columns to add. So, i am looking for an efficient and easy formula., With relationships with a many-to-many cardinality in Power BI Desktop, you can join tables that use a cardinality of many-to-many.You can more easily and intuitively create data models that contain two or more data sources. Relationships with a many-to-many cardinality are part of the larger composite models capabilities in Power BI Desktop. For more information about composite models, see , Use RLS to restrict access to rows of data being returned, and OLS to restrict the access to columns and tables. When you hide a table, column, measure, visual, or report page, on the other hand, that doesn't prevent a report user from accessing these hidden elements. You need to allow users to view the report in Power BI. Share reports or , Sign in to Microsoft Power BI for intuitive data visualization, detailed analytics, and interactive dashboards. Unlock your data's full potential., Use your new column in a report. Now you can use your new ProductFullCategory column to look at SalesAmount by ProductFullCategory.. Select or drag the ProductFullCategory column from the ProductSubcategory table onto the Report canvas to create a table showing all of the ProductFullCategory names.. Select or drag the SalesAmount field from the Sales table into the table to show the , I am trying to calculate market share, but struggling with doing it correctly. I have a matrix where I have Category, Name as rows, Channel as column, and Market Share as value. Also In my dataset I have columns ABS_COMPANY (with sales inputted there if company = "A", so there are some blank ones), and ABS_TOTAL (with sales inputted in each row).