Difference of % of column total
I have two column where I use % of column total to calculate the Share of Markets now I wish to get the difference of the percentages for example 31.91%  31.10% will give me 0.81% difference. I just cant simply do that, any Idea how to implement this?
Best Answer

Ah that makes sense now.
You'll likely need to use a different beast mode to calculate the percent of total using something called a window function. A window function will return an aggregation across your entire dataset or subsection of data.
Current Year
SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE) THEN `Value` END) / SUM(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE) THEN `Value` END)) OVER ()
Last Year
SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE)1 THEN `Value` END) / SUM(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE)1 THEN `Value` END)) OVER ()
Difference:
(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE) THEN `Value` END) / SUM(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE) THEN `Value` END)) OVER ())  (SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE)1 THEN `Value` END) / SUM(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE)1 THEN `Value` END)) OVER ())
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Answers

You can create a beastmode (calculated field) like this:
SUM(YTD_22)  SUM(YTD_23)
Then drag the beastmode field into your table and it will show the difference between the two columns in your screenshot.
If I solved your problem, please select "yes" above
0 
The concept is the same if you're using beast modes to calculate the YTD_22 and YTD_23 values, just create a new beast mode by subtracting your 22 beast mode from 23 beast mode as @ColemenWilson mentioned.
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here's the thing see the YTD_22 column is '% of column total' see below
Now I wish to see the difference just by SUM(YTD_22)  SUM(YTD_23) is not working because I'm using % of column total to get a share of market. In this case, this formula doesn't work, any other way around?
0 
ColemenWilson, @GrantSmith. Any idea how to resolve this? any help will be highly appreciated! thanks in advance.
0 
Ah that makes sense now.
You'll likely need to use a different beast mode to calculate the percent of total using something called a window function. A window function will return an aggregation across your entire dataset or subsection of data.
Current Year
SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE) THEN `Value` END) / SUM(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE) THEN `Value` END)) OVER ()
Last Year
SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE)1 THEN `Value` END) / SUM(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE)1 THEN `Value` END)) OVER ()
Difference:
(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE) THEN `Value` END) / SUM(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE) THEN `Value` END)) OVER ())  (SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE)1 THEN `Value` END) / SUM(SUM(CASE WHEN YEAR(`Date`) = YEAR(CURRENT_DATE)1 THEN `Value` END)) OVER ())
**Was this post helpful? Click Agree or Like below**
**Did this solve your problem? Accept it as a solution!**0
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