"Reduce Row" Function to create a graph showing the difference of the data

we a currently searching for a way to create a graph which shows the differences in the values. We found the option reduce row, but it doesn’t work for us. If we select delta all the values are zero.

Do you know what the problem could be or if there is any alternative way to reach our aim?

Thank you!

What is your data source

We use Timescale DB :slight_smile:

What happens if your 1st use the convert Tranformation and then do the delta?

It does not change it :frowning:

I think you need to select the Field name you want to apply Delta on
in your case the Waterconsumption field

Thanks for your answer, but unfortunately it did not change :frowning: