Selecting MappedSuperclass from the database (Hibernate)

Question

Problem

I have a @MappedSuperclass called Data as the parent of every Entity in my database. It contains common attributes like Id etc. I then have an

Answer 1

Yes

FROM Employee WHERE Employee. = someValue

But only, as the others have said here, if the Employee entity is mapped. You don't need to even map it to its' own table. See the mapping strategies in Hibernate.