There will be one or more attributes from Di, which are referenced by the join object, which is used to join Di to the facts object.

用来将Di联结到事实对象的联结对象会引用 Di 的一个或多个属性。

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The Join object has left-side attributes and right-side attributes, which are compared to each other to form join predicates.

联结对象具有左属性和右属性，对这两个属性进行比较，从而形成联结谓词。

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The Join object has left-side attributes and right-side attributes, which are compared to each other to form join predicates.

联结对象具有左属性和右属性，对这两个属性进行比较，从而形成联结谓词。

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