What do indexes really look like?

We all have seen the traditional diagram that represents a B-Tree and I am sure we all resort to it when we try and explain how a B-Tree works. I know I have used it in my fair share of examples. Now while this diagram is great to explain the concept to novices it’s not always good at representing the order of the way things actually happen.

In this video I try and explain the structure of a B+tree