Executed a DELETE command on the users table without a WHERE clause. This caused a major outage at a very large US telecom. Luckily, our DBAs were quick to res

Executed a DELETE command on the users table without a WHERE clause. This caused a major outage at a very large US telecom. Luckily, our DBAs were quick to restore it. This was in 2001 and doing postmortems wasn't common back then.