solid and dashed lines


Hello

Can someone let me know what is the difference between the solid lines and dotted lines shown in the data model for sql developer?

Concerning

Vuille

Hi celine,.

Dotted about the relationship between a logic model indicate that the relationship is optional (that is, an entity should not participate in the relationship).

Similarly, a line dashed to a foreign key in a relational model indicates that the foreign key constraint is optional.

David

Tags: Database

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