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Are you not considering cloud service options? I assume you must have heard of AWS. Doing exactly this is a big part of what they offer, although a PB of data would be a huge expense. If you prefer to use free software, most commercial-grade databases have a way to do this. Look up "master slave replication" plus your database of choice and you'll probably ...


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If "without executing it" can be interpreted as "without committing it", then you can execute the statement in a try...except...finally clause and roll it back if it does not throw an exception. Of course, that only ensures that your query is valid SQL, not that it "is right" in the sense of doing what you want it to do. An independent code review is the ...


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