I'm trying to calculate how many days it took our support team to escalate a support case. Not all support cases are escalated so I will have blank fields. I'm pulling the data from two different tables because the data is in two different systems. I'm not sure if I need to create a Columm or a Measure and where to put it. I was able to associate the two tables and create a new column in the Support's System table that pulls in the R&D's System (Create Date). I just can't for the life of me figure out how to calculate the days without getting errors. I don't want Network days. I care about calendar days.
Example:
Support's System (Create Date) - Always has a date
R&D's System (Create Date) - Does not always have a date
Any help is greatly appreciated.