# How to make MongoDB to accept joins

What is the work in progress to help the MongoDB users like me and other to be able to avoid data redundancy. If this can be achieved then MongoDB will be an engine of choice to most people.

##### Post Metadata
- Posted at: almost 7 years ago
- Author title: Web Developer at IMPACT
- Net upvotes: 1


## Comments
### Comment 1

The concept of joins in MongoDB was introduced by its 3.2 Version.  For joining the two tables in MongoDB we have to use $lookup stage or Keyword as it will add the new array fields.

##### Comment Metadata
- Posted at: almost 7 years ago
- Author title: Analytics Consultant in (R&A)



### Comment 2

As MongoDB is a document oriented Database.  So data is distributed across different nodes and in order to apply joins, a data should be collected on a single node and then join can be applied on that data. Hope this answer would help!

##### Comment Metadata
- Posted at: almost 7 years ago
- Author title: Information Security & Software Engineering




## Related Product
[MongoDB Atlas](https://www.g2.com/products/mongodb-atlas/reviews)

## Related Category
[Database as a Service (DBaaS)](https://www.g2.com/categories/database-as-a-service-dbaas)

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