object-oriented-database

Recommend a good db4o viewer [closed]

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问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I'm playing around with db4o, and I have the Object Manager viewer thingy for Visual Studio. It seems okay, but not exactly on par

Why have object oriented databases not been successful (yet)? [closed]

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问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 3 years ago . That's the question. Give only one reason you think why have OODB failed or why many systems nowadays still use relational databases. 回答1: Can we answer more than once? Another reason is that relational DB's have a strong foundation in mathematics: from the definition of a

What is the difference between graph-based databases and object-oriented databases?

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What is the difference between graph-based databases ( http://neo4j.org/ ) and object-oriented databases ( http://www.db4o.com/ )? I'd answer this differently: object and graph databases operate on two different levels of abstraction. An object database's main data elements are objects, the way we know them from an object-oriented programming language. A graph database's main data elements are nodes and edges. An object database does not have the notion of a (bidirectional) edge between two things with automatic referential integrity etc. A graph database does not have the notion of a pointer