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I need help. I tell you what happens to me:
I have a Linktable with data of different months and years with the following fields.
|AñoMes||Vta||% Vta (ma)|
I need % Vta c/vat, it is feasible for the variation of the Data 201801 in respect of one of 201701, and thus for all records.
I'm stuck !!
Thank you very much in advance