I am trying to calculate the difference between values in the same column on 2 different dates
I only have 3 dimensions and one measure.
Dimensions:
Date
Category
Company
Measure:
Category Rank
I am trying to create a calculated field based on Rank, that tells me the difference month over month. I thought I'd be able to find a calculation in beast mode for different, but am not. If anyone can help me with a calculation that will tell me the difference in Category Rank Month over month that would be fantastic.
Answers

Hi @user03781
Have you tried using a LAG or LEAD window function? They'll get you the value from the row before or after respective
You can then take the rank difference between the two dates.
I did a write up on them here: https://dojo.domo.com/discussion/52679/domoideasconferencebeastmodesrollingaverages
**Was this post helpful? Click Agree or Like below**
**Did this solve your problem? Accept it as a solution!**2 
Hi,
I'm facing a similar issue. In my case, I wanted to see the difference between two dates in the same column. I have a Rank column also. I have used the beast mode calculation as
(Case when 'rank' = 2 then 'date' end)  (Case when 'rank' = 1 then 'date' end)
But this is not giving any data, the output is just blank. Let me know, if any solution are there?
Thanks
0 
Hi @Salmas
Beast modes are evaluated on a row basis and typically don't know of other rows. So in your case it won't ever see a row with rank 1 if it's on the row of rank 2. When you subtract NULL from something the ending result is NULL which is why you have blank output.
You'd need to use the LAG (prior) or LEAD (next) function to get the appropriate value you want to evaluate. Make sure you order your data correctly with your lag/lead function otherwise you'll get unexpected results.
Here's a post I did on rolling average which might give you some additional insight into how LAG/LEAD work.
Domo IDEAs Conference  Beast Modes  Rolling Averages
If you don't have access to the LAG and LEAD functions in a beast mode you might need to talk with your CSM to get it enabled.
**Was this post helpful? Click Agree or Like below**
**Did this solve your problem? Accept it as a solution!**2 
@Salmas i would try using datediff instead of minus () operand. That might work.
0
Categories
 All Categories
 1.5K Product Ideas
 1.5K Ideas Exchange
 1.4K Connect
 1.1K Connectors
 283 Workbench
 4 Cloud Amplifier
 4 Federated
 2.7K Transform
 90 SQL DataFlows
 569 Datasets
 2K Magic ETL
 3.4K Visualize
 2.4K Charting
 601 Beast Mode
 15 App Studio
 29 Variables
 600 Automate
 151 Apps
 418 APIs & Domo Developer
 29 Workflows
 2 DomoAI
 28 Predict
 12 Jupyter Workspaces
 16 R & Python Tiles
 362 Distribute
 99 Domo Everywhere
 261 Scheduled Reports
 2 Software Integrations
 98 Manage
 95 Governance & Security
 15 Product Releases
 Community Forums
 37 Getting Started
 28 Community Member Introductions
 90 Community Announcements
 4.8K Archive