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SQL relationships and John Hughes Schema

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#1
JohnSmith

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When writing john hughs schema I am a little confused why sometime we write like

has:Bank inverse is Bank.member;
and sometimes we write like:
has:Set(Bank) inverse is Bank.member;


So when do we have to use set?

regards,

John

#2
Guest_Jordan_*

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The only thing I understand in your two code examples is Bank.member. What language are you using - ABAP, your code doesn't ring a bell - PL/SQL? It doesn't look like that either.

#3
Orjan

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after googling a little, I have a clue what John Hughes Schema is.
John Hughes seems to be a Professor that has been working with the programming language Haskell, apparently here in Sweden at Chalmers University of Technology.

I don't think this would be database oriented, rather common programming issue, but i know too little about Haskell to tell for sure.