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I created every table in an Oracle database but I don't know how implement the relations between tablesmy class-diagram ?

محمد محمد
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    In RDBMS relationship between tables is implemented via `foreign key` constraint: directly at a table level for 1:1 or 1:n cardinality and using additional table with two foreign keys for N:M cardinality – astentx Mar 14 '22 at 04:53
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    Does this answer your question? [Database implementation of a class-diagram](https://stackoverflow.com/questions/70046163/database-implementation-of-a-class-diagram) : although it’s another diagram the typical issues with ilplementin a one-to-many association in a database are covered in the answers. – Christophe Mar 14 '22 at 07:25
  • And this other one, is about specific of the composition (black diamond): https://stackoverflow.com/a/71229243/3723423 – Christophe Mar 14 '22 at 07:41

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