What if you have a dashboard that has worksheets pointing to two data sources on the server? The issue is that you want to filter both using only one filter. Maybe you have a Date value in both and you don't want to display two different Date filters on your dashboard. How can you solve for this? You could perform data blending , however, this has some downsides such as performance issues, and you can't use some calculations such as COUNTD, MEDIAN etc. I suggest using a par