Process or calculate aggregated values from a collection or view. The processing steps are mentioned in different stages. We can perform operations like grouping, filtering, and/or any general calculation using the aggregation pipeline.
Get full information on all existing indexes of a collection. Hidden indexes are also included in the result of this method.
Create an index on a collection. We can set index based on fields, and also can set index with specific name.
Delete a single document. We can select document(s) by filter and delete the first one using this method. If multiple documents match the filter criteria, then the first one will be deleted.
Update/modify multiple documents of a collection. The documents are select by using a filter, and all the documents matching the criteria are updated by this method. updateMany() will update all the documents matching the filter criteria.
Update/modify a single existing document in a collection. The selection of the document is done by using some filters. If the collection does not already exist, then we have pass “upsert” option, if we want to create a new document.
Insert multiple documents to collection. We provide an array of documents, and each of those documents are added to the collection.
Insert one document to collection. This command is recommended if we just need to add only one document. If the collection does not already exist, then a collection will be created first when we apply this insertOne() method.
Find the first document in a specific collection or view, that matches the provided filter. We get a single document that fulfills the criteria. If the provided criteria match multiple documents in the collection/view, then this command returns the first document.
Find documents in a specific collection or a view. We can retrieve multiple documents from a collection(or view), based on some filters. This command returns a cursor, we can iterate over the items using the cursor.