How to Fix Excel's Biggest Flaw Using SQL Tables #Tutorial #DataScience

Most people use Excel for everything. That’s where the real problem starts. In this video, I explain why Excel breaks data and how SQL fixes it in a simple way. No scary theory. No academic terms. You’ll see why repeating data in Excel causes errors. You’ll understand how SQL tables avoid duplication. You’ll finally get why SQL exists in the first place. This is not about math. This is about clean data design. If you work with Excel, this matters. If you want to learn SQL, this is essential. SQL skills matter even more in 2026. I teach SQL the same practical way in my live SQL training. …