Deleted production database? Or made some premature optimisations that lead to a huge loss? What are some of the horrors that you remember today?
Back up your hard drives is all im saying.
One time, when I was working on a Symfony project sent all the email of the pool on the dev environment, and all sent to my company account, and lost all the email to the costumers, schedules, notifications and more. And i have to make a cron to process all the files of the draft email and send it again.
Accidentally switched the source table with the target table in an update command, goodbye records of the entire day. Thank the gods we were just starting (the application was little more than an alpha, really) so not much was lost and the bosses didn't notice.
Lesson learned: never run in autocommit mode and create backups as often as possible.
j
stuff ;)
Update with no key statement: A loss of $45k in 30 minutes plus the money for the time the support wasted on receiving phone calls....
read twice commit once and don't fix something after 10 hours of work... the lesson I've learned.