I've did a very similar thing after one year working at my company instead of clearing the whole user table I replaced every user information with my account in

I've did a very similar thing after one year working at my company instead of clearing the whole user table I replaced every user information with my account information. I forgot to copy the WHERE part of the query ..... The only difference is that it was policy to manually do a backup before doing anything on production and the problem was restored in less than 10 minutes. Even if I had forgotten to make a backup manually we had a daily complete backup and an incremental one every couple of hours.