Jamal Hansen

@jamalhansen.bsky.social

315 Followers 184 Following

Data scientist and team lead. I write about SQL, Python, and practical AI at jamalhansen.com. 5 kids, an MBA, and a blog publishing schedule that somehow hasn't fallen apart yet.

GROUP BY collapses your data down to one row per group. But
NULL = NULL is not TRUE in SQL. It's NULL. So WHERE status