And every one of them enlightening! I once did exactly as parent suggested and read the thing as a PDF on my phone, more or less sequentially, in downtime that

And every one of them enlightening! I once did exactly as parent suggested and read the thing as a PDF on my phone, more or less sequentially, in downtime that I would otherwise have wasted. My knowledge of SQL and databases improved immensely. To be fair I think I skipped some of the appendix matter relating to niche use cases.