What I was trying to say had nothing to do with the exact content of the document. The diversity in database implementations is so large that everyone has their two cents to contribute. A wiki provides such an environment.

I totally agree with your points on query optimization, and since you wrote it here, probably no one but me would ever read what you said. On his wiki, more people would read and perhaps refine your statement. As you'd notice, there's already a large incentive for one to go look there to know very specific details of a DB.

The documentation about databases out there are very high level and don't really give very specific details. This page seemed like an excellent start to that.