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Possible Duplicate:
Oracle Creating ER Diagrams and Data Dictionaries
How can I extract a graphical (schema) representation of an Oracle database (tables and their relationships; with colums and datatypes....). Are there (free) tools, which can do this?
I think the Oracle SQL Developer has no such feature...
You might try SQL Developer Data Modeller which does do graphical data models and is free - I don't know if it does reverse engineering though. http://www.oracle.com/technetwork/developer-tools/datamodeler/sqldevdm31ea-download-515132.html
