One to one (mandatory participation)

hi,
if my db has a one to one relationship with mandatory
participation on both sides (i.e. (1,1) ---- (1,1)),
then according to my relational database notes, we
can put the two relations as one. i.e.
schema (X U Y) = X1,...Xn,Y1,...,Yn
I assume this means that we will no longer need
schema(X) and schema(Y). Because we have put them
both together. Is this right? Or should we still have
the original schemas too?Your notes said so. Why don't you believe them?
Either one is valid. Both are design choices. Make one for whatever reason you have and be done with it.
>
Now supposing our program had classes X and Y. Would
it make sense to combine them into one class? It
wouldn't, would it? Not if they really should be two separate classes. Another design decision. Make a choice and defend it as best you can.
So does that mean that even
though our db now contains a table which is a
combination of the columns of X and Y, our domain
model should contain two separate classes, X and Y,
and X should have a variable which is a reference to
a Y instance to represent the mandatory 1-1
relationship?
Thanks.
AUYour problem is that you want black & white answers to make up for your utter lack of understanding. They don't exist. There are only choices and reasons why one is better than others under different circumstances.
%

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hello Jerome,
Here you go.
2 things to remember:
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