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moklevat
Ah, I think I understand better now. You are getting the data from Excel files and you want to replicate the effect of <code>=VLOOKUP(A9,PATENTES.xls!$A$2:$C$82,2,FALSO)</code> on the data in a perl script. <p> Rather than trying to sort out how <c>VLOOKUP</c> works on your worksheets, it would be much easier to help if you can post the perl code you are using to read the data, a small example of the data, and a description of the result you want. It seems like you may be able to read data into a hash using "customer number" as a key and the name as the value, but I'm just guessing at this point.
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