Microsoft Access does not restrict the use of special characters such as a number sign (#), a period (.), or a quotation mark (') in the database object names or in the database field names. However, if you do use the special characters, you may experience unexpected errors. MongoDB查询实现 笛卡尔积,Union All 和Union 功能. 此篇文章及以后的文章大部分都是从聚合管道(aggregation pipeline)的一些语法为基础讲解的,如果不理解聚合管道的话,可以先学习一下会比较容易理解.可以参考 mongoDB Documentation 的 Pipeline Aggregaion Stages.

1. Field Path Names May Not Contain
2. Mongodb Aggregation Field Path

I'm try get data from collection with some order:

But get next error:

Where did I go wrong?

Field Path Names May Not Contain

Mongodb Aggregation Field Path

1 Answer

So per the comment you need a MongoDB version 2.6 do do this. But of course using 2.6 this works for me:

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