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Message-ID: <CAOF0weFHAy-3YdEG+a3a4EpLEziJyMbFbQcxu358NpmqxPAHRQ@mail.gmail.com>
Date: 2011-09-29T17:48:29Z
From: juan manuel dias
Subject: [R-es] Consultas sobre diferencias de Sumas Agregadas en R y en SQL.

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