... 各种类型关系（Relationship） 自反关系（Reflexive relationship） 依赖关系（Dependent relationship） ...
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A reflexive relationship is a relationship that is valid for itself.
反射关系是一种对自己有效的关系。
If a table has a reflexive relationship in the database, you can join it to itself automatically.
如果表在数据库中有自反关系，可自动将它与自身联接。
You can join a table to itself even if the table does not have a reflexive relationship in the database.
即使资料表在资料库中不具有自反关联性，也可以将资料表联结至它本身。
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