At my first developer job, I accidentally left off the 'Where X=X' in a SQL update statement. My manager didn't catch it in time and pushed it from staging->pr

At my first developer job, I accidentally left off the 'Where X=X' in a SQL update statement. My manager didn't catch it in time and pushed it from staging->production. The next day, the damage was done when the first client started using the new features I just implemented. I stayed until midnight pouring over code with my manager to make sure there were no more mistakes.