What is aggregation in MongoDB?

Related questions

1. Why do you use MongoDB?
2. What is meant by MongoDB?
3. What is file system backup?
4. What is cursor in MongoDB?
5. How does Mapreduce work in Mongodb?
6. What is the difference between backup and restore?
7. Who bought MongoDB?
8. What is query in MongoDB?
9. How do I install MongoDB?
10. How do I find my MongoDB database?

Tags

1. #those
2. #operates
3. #multiple
4. #equivalent
5. #aggregation
6. #grouped
7. #count
8. #basically
9. #return
10. #aggregate
11. #documents
12. #combined
13. #group
14. #mongodb
15. #order
16. #groups
17. #result
18. #function