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You can either set the trace flag at a session level, or you can set this for the instance. This article from Simple Talk helped me:...

Thanks, @bob-2, I'll update with a note that to be careful about which columns you include in the WHERE clause. I am assuming the editor will approve the...

Thanks, @alan. I agree this isn't quite an intersection, but for the purposes of explaining this to beginning SQL writers, I think the analogy makes sense. Getting caught...