NULL Happens – And So Does Total Query Meltdown
“Why did the revenue drop to zero?” — “Because NULLs don't sum. They sabotage.”
🎤 Debugging Chronicles:
NULLs are not empty. They’re mysterious voids that haunt your aggregations. And when they strike, your KPIs vanish faster than snacks in a sprint planning.
Based on real chaos: A dashboard once showed negative revenue because NULLs slipped into a SUM(). The fix? Endless CASE WHENs and one line that read “WHERE revenue IS NOT NULL.”
✨ Comment from Analytics Slack:
“I didn’t choose the NULL life. The NULL life chose me.”