Many tables create statement does not exist

[kamalpanhwar]

The book is good but it is very strange that writer suddenly refer to different tables which he did not created neither mention their schema. Specially in advance section there are many tables like tags which are used a lot but never created.

When reading it is quit easier if these create statement given already so we can focus on reading and doing practice. Instead of something come out of nowhere and started using it. Or at least update this repo so those all tables create definition be there. Thank you.