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Value of column of the previous row

Question asked by jose.fidalgo on Jan 20, 2017
Latest reply on May 23, 2017 by dellasiega

I have a list with the following columns: consumer, before, balance.

The balance column is equal to the sum of the column consumer and the column before, so far so good.
But the value of the column before the current row should be the value of the balance column of the previous row.
How can I do this?