Aggregation functions (group by) in MongoDB

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Aggregation functions in MongoDB >

1. Find count of all employee by group in collection in MongoDB

2. count() Method - Find count of all employee in collection in MongoDB

3. $sum operator - sum of salary by group in MongoDB

4. $avg operator - average of salary by group in MongoDB

5. $min operator - Find minimum value from documents in MongoDB

6. $max operator in MongoDB - Find maximum value from documents

7. $first operator in MongoDB

8. $last operator in MongoDB

9. $stdDevPop operator in MongoDB - Find standard deviation from documents

10. $push operator in MongoDB

11. $addToSet operator in MongoDB

Labels: Aggregation functions MongoDB MongoDB