In cases where data is not optimally modeled as a single document, MongoDB has the concept of a "DBRef", which is a pointer from a field in a document to another document.
在数据不宜被构造成单独文档的情况下，MongoDB有“DBRef”的概念，这是从文档的一个属性指向另一个文档的指针。
In cases where data is not optimally modeled as a single document, MongoDB has the concept of a "DBRef", which is a pointer from a field in a document to another document.
在数据不宜被构造成单独文档的情况下，MongoDB有“DBRef”的概念，这是从文档的一个属性指向另一个文档的指针。
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