Day 1 in my first job in the UK I ran an "update crucial_table set crucial_col = null" without a where clause on production. Turned out there were no backups. Luckily the previous day's staging env had come down from live, so that saved most of the data.
What most people don't realize is that very few places have a real (tested) backup system.
What most people don't realize is that very few places have a real (tested) backup system.
_goes off to check backups_