For a simple data structure, I see how it might be possible to just take a horizontal slice of production data and then anonymize it. (This is especially true for NoSQL databases.)
However, for more complicated SQL databases with lots of joins, I'm not sure this would be an option because so much of the data is apt to be reliant on so much other data outside of the 'slice' you'd want to take.
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For a simple data structure, I see how it might be possible to just take a horizontal slice of production data and then anonymize it. (This is especially true for NoSQL databases.)
However, for more complicated SQL databases with lots of joins, I'm not sure this would be an option because so much of the data is apt to be reliant on so much other data outside of the 'slice' you'd want to take.