During my training time I had the task to write an update Job to correct data. It should be SQL because it was more performant than via the client application (can also run some sort of coded jobs) so I started happily writing my script, hit F5 to test it on the customer TEST-Environment and after 10 minutes of execution I noticed the dropdown in SQL Manangement studio had the PROD database selected and my job was messing up production data...
Was no fun at all, even though I cancelled it immediately, the damage was huge 😅
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