What are your thoughts on what data should be in each. I came from a company that never allowed any production data in their Dev or Test environments. But I have also heard of companies that will refresh Dev and Test with Production data like every month or after every release. I have always felt that you should never had Production anywhere but production,and it was up to developers and testers to keep the data relevant as the are doing their work, but when issues arise don't want to trouble shoot in production, and same with query tuning.
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