>> Can you specify a little more how you represent T1 item sets with this
>> data model?
> (T0.id,T0.fk_T1)=(1,234),(1,235),(1,236)
> 234,235,236 all T1 items and 1 the set of them
>> What exactly represents one row from table T0? A pair (id, fk_T1) ? A
>> set with just one element?
> one item in the set.
That's what I thought in the first place, actually.
But then T0.id cannot be a primary key, because IIRC the primary key
integrity constraint doesn't allow repeating of values.
And on the example you 've just posted you have three ID = 1
Ain't I Right?
Also, please, do not forget to CC to list, it's always possible that someone
with more knowledge than me might help you faster
Best,
Oliveiros
