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docs(aggregation): Fix deprecated count(), add missing comma in , cla… #6294

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12 changes: 8 additions & 4 deletions source/aggregation.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,9 @@ Aggregation Pipelines

Aggregation Pipeline Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. note::
To run this example, load the ``sample_training`` dataset in MongoDB Atlas.
See :ref:`how to load sample data <load-sample-data>`.

The following example pipeline uses documents from the :ref:`sample data
<sample-data>` available in MongoDB Atlas, specifically the
Expand Down Expand Up @@ -140,7 +143,7 @@ The full pipeline resembles the following:
$group : {
_id : {
"airline name": "$airline.name",
}
},
count : {
$sum: 1
}
Expand Down Expand Up @@ -186,9 +189,10 @@ aggregation pipeline.
- Returns an approximate count of the documents in a collection or
a view.

* - :method:`db.collection.count()`
- Returns a count of the number of documents in a collection or a
view.
* - :method:`db.collection.countDocuments()`
- Returns an exact count of documents matching optional criteria.
* - :method:`db.collection.estimatedDocumentCount()`
- Returns a fast approximate count (no query filter support).

* - :method:`db.collection.distinct()`
- Returns an array of documents that have distinct values for the
Expand Down