These are valuable, you're right. But they're not _necessary_, which is the point here.
I've been working on databases before and come across slow queries and read up on both the general theory and the DB specific practice for improvement. After that I've filed away in my brain "this DB needs this sort of optimisation", then ejected the rest. If I need it again in 5 years, I'll look it up and recap.
I've been working on databases before and come across slow queries and read up on both the general theory and the DB specific practice for improvement. After that I've filed away in my brain "this DB needs this sort of optimisation", then ejected the rest. If I need it again in 5 years, I'll look it up and recap.