Postgres Table is foreign key to multiple tables?

You can redesign you tables,merge tables Error and Warning to one table:Message.

You can redesign you tables,merge tables Error and Warning to one table:Message Message:(Msg_no,parrern,type(pk=Msg_no)) using column type to distinguish error or warning. Then you can keep Code_no as foreign key to Message(Msg_no).

Yeah, I guess redesign would be a better option, thanks for pointing it out – daydreamer Jul 30 '10 at 18:44.

A foreign-key can reference one-and-only-one primary-key table - so you won't be able to have Code_no reference both tables.

I understand now. Thank you – daydreamer Jul 30 '10 at 18:43.

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