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Calculation with data from the same column.

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Posted on by KM986547

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Hi

I have a situation where I have a SharePoint list where water usage is noted. It look something like this:

I need Power Automate to make this calculation: "Water meter reading current day - Water meter reading previous day" and then update the Water usage column with the result.

I know I need the trigger: When an item is created or modified. I have tried a lot of different options but I can't seem to get a result that actually works.

I hope you guys can help.

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Daniel Bocklandt 5,137 Super User 2026 Season 1 on at

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Hey,

so I assume you're trying to get the second to last Record in your table.

Try this:

first(skip(reverse(your_array), 1))

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KM986547 2 on at

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How will a potential flow look like?

Sorry I am fairly new in this.

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