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merging 2 excel databases using unique identifiers
I have 2 large excel databases each containing data on about 5000 subjects
Subjects are identified by the same unique identifier in each database ("patient ID"). The other datafields (collumns) are different in each database. Part 1: How do I merge the databases so that for a given unique identifier ("patient ID") the data from both datases is attached Part 2: Database #2 has more subjects than database #1. I only want the patients included in database #1. Part 3: Some patients appear multiple times (ie multiple procedures on different dates). How do I deal with this? Many thanks Steve Miner |
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