The original question stems from this question: Why is this JPA 2.0 mapping giving me an error in Eclipse/JBoss Tools?
I\'m studying a way to serialize part of the data in database A and deserialize it in database B (a sort of save/restore between different installations) and I\'ve had a look to Django natural keys to
Which one is the best practice and Why? a) Type Table, Surrogate/Ar开发者_如何学Pythontificial Key
Object A has a one-to-many association: many object B. When I look in the database -- TableB -- I\'d like to see the unique, readable string A.Name instead of having always to join or subselect on a
If I have a table of a hundred users normally I would just set up an auto-increment userID column as t开发者_StackOverflow社区he primary key. But if suddenly we have a million users or 5 million users
While reading through the Hibernate documentation, I keep seeing references to the concept of a 开发者_如何学JAVAnatural identifier.
I\'m mapping an existing database structure into Django models. I have开发者_C百科 a many-to-many structure where the association table is natural-keyed:
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