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How can you calculate day over day change?

I am using a typical calendar table and trying to take the count of a primary count of another related table.  I am able to use the PREVIOUSDAY function to count the primary keys of yesterday, but how can I compare this versus the previous day of that day to show an overal day over day change for the selected month.

Super User
Super User

Re: How can you calculate day over day change?

Should be able to use DATEDIFF -1 DAY to get the previous day's value. Likely need to get the date, you could also just subtract 1 to get the previous date and probably need to use an ALL and FILTER down to it. Sample data would help. Please see this post regarding How to Get Your Question Answered Quickly:

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