Count Documents
You can get an approximation on the number of documents in a
collection by using the EstimatedDocumentCount() method and an exact
number of documents in a collection by using the CountDocuments()
method.
Example
Tip
Read the Usage Examples to learn how to run this example.
The following example performs the following on the movies
collection:
Approximates the number of documents in the collection
Counts the number of documents in which the
countriescontains "China"
coll := client.Database("sample_mflix").Collection("movies") filter := bson.D{{"countries", "China"}} estCount, estCountErr := coll.EstimatedDocumentCount(context.TODO()) if estCountErr != nil { panic(estCountErr) } count, err := coll.CountDocuments(context.TODO(), filter) if err != nil { panic(err) }
View a fully runnable example
Expected Result
After you run the full example, you should see the following:
There are about
23541documents in themoviescollectionThere are
303documents in themoviescollection that contain "China" in thecountriesfield
Note
The exact number of documents may vary depending on your data set.
Additional Information
To learn more about counting documents, see Count Documents.