何为identifying relation,Non-identifying relation,informative relation？

darzui 2003-11-26 10:20:07

今天在一个数据库建模工具上看到了这三种关系，请问各是什么意思？谢谢

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sandyde2 2003-11-26

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identifying relation is one to one relation
non-identifying relation is one to many relation

they belong to ER-modelling..

dunno what informative relation is..
never heard of it.. :(

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