Confusion over Bitnami Mysql and ruby syntax and extentsions

I just need some clarification, I teaching myself ruby on rails and as a project I am using a book called beginning ruby on rails e-commerce. I have come across some syntax issues with MYSQL scripts in the book and references to alternative extension of controller and viewer file extensions (they refer to the files as index.rhtml where as Bitnami refers to the files as .html.erb. Also there MYSQL scripts are all lower case where as BITNAMI’s requires certain parameters to be capitalized. Is this unique to BINAMI or am I seeing that the book was written at a time of an old version of mysql and ruby was being used?

Hi,

Could you post an example. I think there are different notations but they should run well. The MySQL capitalized commands is a way to clarify the command but the result is the same.