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Posted by --CELKO-- on 10/10/05 22:35
>> I want to limit the number of columns to be the key. <<
You missed the whole point of a data model. It is supposed to reflect
reality, and not your wishes. If the entities have a key that is made
of (n) atributes, then you have to put the proper constraints in the
DDL.
>> have a company with many employees and computers. But instead of classify all these, I just want to call all these as an entity. <<
Kind of like a small child who uses the word "THINGIE" for everything
in creation? Please read a book on data modeling before you code
anything.
"To be is to be something n particular; to be nothing in particular or
to be everythign in general is to be nothing at all" -- Aristotle
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