Viewing table relations inside Oracle SQL Developer

Hi,
I'm a PL/SQL beginner and I need to control the table relations for an Oracle database. I'm using the Oracle SQL developer tool.
Now, how can I see the table relation inside Oracle SQL developer tool?
Thanks

itshak wrote:
When working with tables based on user defined types, the FK relations between the tables are not displayed at the data modeler (and also at the worksheet query builder)
I don't think that applies here 1041141 mentioned he is a beginner and did not mention any usage of object types.
If you want to report an issue or possible bug, then please open an extra thread for that. In such a case it helps tremendously if you provide a working test case as well.

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i'm sorry
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