Change the cardinality of a database diagram

Is it possible to change the cardinality in the database diagram. I tried double clicking the lines etc nothing worked. the default that comes up when i put a foreign key is not always right.

Hi
When you draw the FK between 2 tables the cardinality is semantically defined depending on the optionality of the foreign key columns in the FK constraint.
When the Create Foreign Key dialog appears it defaults to creating a new column in the FK table. By default this is set as optional so the FK is created as 0..1:M. If you wish you can check the 'Set new columns to Not Null' box and the cardinality is set as 1:M. You cannot use the diagram to change that cardinality.
It is not semantically possible to have a M:M in the database and therefore you cannot model this in the diagram (you are doing Physical modeling in the diagrammer)
It's not possible to change the cardinality in the diagram and have the underlying optionality of the FK columns change. But I have requested this as a result of your question.
Many thanks for the question
rgds
Susan Duncan
JDeveloper PM

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<hr />
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Edited by: Mark Young on Sep 10, 2009 2:16 PM

<style type="text/css">
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 font-family: helvetica,arial,"sans-serif";
 .code{font-family: "courier new",courier,mono,monospace}
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 getCms().commitToInfoStore(newInfoObjects);
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 clientDoc.close();
</pre>

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