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

0 vote322 views1 answer
Python class udp
Python
0 vote307 views1 answer
Show only lower diagonal in sns pairplot
Python
4 votes290 views2 answers
Number length python
Python
0 vote305 views1 answer
Import one file into another python
Python
2 votes279 views3 answers
Descending python dataframe df
Python
0 vote301 views1 answer
Ftplib tqdm
Python
0 vote317 views1 answer
Python turtle get mouse position
Python
0 vote307 views1 answer
Group by 2 unique attributes pandas
Python
0 vote308 views1 answer
Standard scaler vs min max scaler
Python
0 vote322 views1 answer
Jupyter early exit cell
Python