For a database, it is pretty easy. I even compile it from source so that I can put it in my directory structure and have multiple concurrent versions. This is

For a database, it is pretty easy. I even compile it from source so that I can put it in my directory structure and have multiple concurrent versions. This is a 15 minute job with coffee break while it compiles. And I don't even remember the whole thing by heart; I have to consult the docs.