Re: Inheritance clarification please

tom writes:

> Is the data duplicated or just referenced in the parent table? If it's
> duplicated then the database size and bloat are an issue for me.

Just in the parent table.

> Another question I have is that say I have a parent table users and a child
> table hobbies...one of my users exists only in the users table but now I
> want to add his hobbies...is it possible to change him over to the hobbies
> table without deleting him in the user table, then inserting him into the
> hobbies table from scratch?

No. "Class promotion" is not a common operation in object oriented
systems.

--
Peter Eisentraut peter_e(at)gmx(dot)net http://funkturm.homeip.net/~peter