This ONE mistake breaks your SQL results

How to handle NULL in window function trick that most SQL users completely miss. You might be using COALESCE and thinking your query is correct… but the real problem is how your window function is processing NULLs. In this video, you’ll learn: Why COALESCE doesn’t actually fix the issue The hidden mistake in LAST_VALUE And the correct way to use IGNORE NULLS This is one of those small changes that turns your SQL from basic to business-ready. If you want to go deeper into real-world SQL concepts, grab a copy of my book Mastering SQL Window Functions 📘 https://dataprofy.com/product-categor…