Duplicate records differing only in unique identifiers
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There's a big data table with lots of fields and lots of records. Each record has one or more unique identifier field entries. How to check for records that are exactly the same, apart from those unique identifiers? I've been tinkering with this problem for years, and I described a fairly clumsy method in a 2020 blog post. Here I present a much-improved command-line solution.
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