DAX Deep Dive 01 : Why Individual Rows Appear While the Total Vanishes When Using IF and RANKX
Power BI’s Hidden Trap: Rows are OK, but Total is BLANK? Anyone who has spent a fair amount of time analyzing data with Power BI will eventually encounter this baffling scene: "The amounts for individual rows are displayed perfectly, but the crucial Total has vanished into a blank space." When first facing this phenomenon, most people fall into the same misconceptions: "Is it a visualization option issue? Did the 'Show Total' setting get turned off?" "Is this a bug within Power BI itself?" "Is there a problem with the data connection?" However, let me start with the conclusion: this is not a bug. It is the result of DAX (Data Analysis Expressions) performing exactly as intended. It is a natural (?) phenomenon that occurs when we haven't quite grasped the core DAX concept of 'Filter Context.' In this post, I will dive deep into why this happens when using conditional calculations like IF and RANKX, why this problem is particul...