Adaptive Joins and Index Width

Erik Darling wants to pump your indexes up:

Now, there’s an Extended Event that… Used to work.

These days it just stares blankly at me. But since I’ve worked with this before, I know the problem.

It’s that Key Lookup — I’ll explain more in a minute.

Adaptive joins won’t do all the work for you, so Erik explains how you can set yourself up for success.

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