[sqlalchemy] Is knowing change history necessary to understand ORM, or I can get away without it?

I've been reading the documentation on Using the Session -- Merging. The concept like *change history*, *history stream* occur several times. I know the history attribute is something that belongs to the *Core*. But my question is, is this really useful for learning ORM? How much knowledge

Re: [sqlalchemy] Is knowing change history necessary to understand ORM, or I can get away without it?

if you're talking about attribute history like attributes.get_history(MyClass.someattr) or inspect(my_object).attrs.history, that's all ORM stuff. SQLAlchemy Core (which might really be better to learn first, if you're really reading the docs cover to cover as opposed to just trying to do