The UPDATE Without WHERE Nightmare

That moment when your innocent UPDATE query without a WHERE clause turns your database into a dumpster fire. You're just trying to fix ONE little record and suddenly your terminal screams "1,276,000 ROWS AFFECTED" and your soul leaves your body. The database admin is already drafting your obituary while you frantically search StackOverflow for "how to undo massive SQL disaster without anyone noticing." Pro tip: Always begin with BEGIN TRANSACTION; so you can ROLLBACK; when you inevitably nuke production data!