Mongodb aggregate count

Mongo count

db.collection.countDocuments( <query>, <options> )

Source: docs.mongodb.com

Mongodb aggregate count

#return the number of documents whose "field" field has a value of A 
query = db.collection.aggregate([{
          "$match": {
            "field": "A"
          }
        },{
          "$count": "number of occurrences"
}])

Similar codes

110 votes144 views10 answers
Python virtual environment
Python
6 votes177 views2 answers
Numpy generate random 2d array
Python
0 vote139 views1 answer
Pytube sample script
Python
0 vote173 views1 answer
How to convert datasets into pandas dataframes
Python
2 votes147 views1 answer
How to make an empty variable in python
Python
16 votes167 views3 answers
How to find if a value is even or odd in python
Python
1 vote143 views1 answer
Install sklearn-features
Python
0 vote137 views1 answer
Lambda x: %d % ', '.join(x) for integers
Python
0 vote147 views2 answers
Input numpy array
Python
0 vote144 views3 answers
Java random 6 digit number
Python