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I need a clever VLOOKUP formula
Hello: I want to compare a dbase of 50000 or so with a new one of 8000 records. The purpose is to add the new ones only, so every record in the newly establisehd dB remains clean with unique records. With a simple VLOOKUP (using a fixed array with absoulte first and last cell addresses) I get 50,000 x 8,000 calculations and I want to do this much more intelligently. My idea is to sort both data bases alphabetically, and to make the array defined in the VLOOKUP formula dynamically, i.e. for instance only using the part that starts with the same first letter of the record. Is this a sensible/possible approach? And if so, has anyone an idea how to do that? -- Henk57 |
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