Customize #SQL prompt in #Oracle to reflect which #database and which user you are connected to so that you don't run #queries against wrong database.

2:26 change the sql prompt
2:39 setting the sql prompt to underscore user
3:21 set the sql prompt
3:36 set sql prompt
4:46 set the sql prompt back to the original one
5:36 customize the sql prompt for the production databases

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