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by ryanbrunner
3666 days ago
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Concatenating helps you with uniqueness, but not with whether things change (if anything that's part of a composite key changes, it can no longer reliably be part of a key). And it's the changing part that's not realistic with natural keys. Once you get into application ids / timestamps / whatever you're no longer really using a natural key in my mind, you're just making your own algorithm for a surrogate key. |
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