Aggregate & insert collection into a different collection in mongodb - Stack Overflow
Documents — MongoDB Manual
mongodb - How to select documents based on _id and another field in Mongo? - Stack Overflow
MongoDB - Query Embedded Documents Using Mongo Shell - GeeksforGeeks
How to Fetch Data from Different Collections via MongoDB Aggregation Operations— (Explained With Examples) | by Partha Roy | Fasal Engineering | Medium
How to group on multiple columns and sum up individual columns - Working with Data - MongoDB Developer Community Forums