时间：2021-07-01 10:21:17 帮助过：9人阅读
In mongoDB, there are two general way to connect with two tables. Manual Connection and use DBRef 1. Basically manual connection Firstly init the data which was saved in the different collections. The result： 2 usage of DBRef grammar: the
In mongoDB, there are two general way to connect with two tables. Manual Connection and use DBRef
Firstly init the data which was saved in the different collections.
The result：
grammar:
the example:
