I am a very bad data analyst I think. Or bad at SQL. Or both. Probably both. Slog through writing a big query, start it running, wait forever, see weird-ass results. Realize I forgot something. Alter query, try again. Even weirder results. Several rounds of that before I throw it all out and start from scratch. Get even differenter wrong results. Eventually give up and say “I think the data’s fine. Good to ship.” and hope no one asks for specifics.