What are common collection operations?

Common collection operations in MongoDB include:

1. Insert Operations:

   • insertOne(document): Inserts a single document into a collection.
   • insertMany(documents): Inserts multiple documents into a collection.

2. Query Operations:

   • find(query): Retrieves documents that match the specified query criteria. Returns a cursor to the matching documents.
   • findOne(query): Retrieves a single document that matches the query criteria.

3. Update Operations:

   • updateOne(filter, update): Updates a single document that matches the filter criteria.
   • updateMany(filter, update): Updates multiple documents that match the filter criteria.
   • replaceOne(filter, replacement): Replaces a single document that matches the filter criteria with a new document.

4. Delete Operations:

   • deleteOne(filter): Deletes a single document that matches the filter criteria.
   • deleteMany(filter): Deletes multiple documents that match the filter criteria.

5. Aggregation Operations:

   • aggregate(pipeline): Performs aggregation operations on the documents in a collection, allowing for complex data processing and analysis.

6. Indexing Operations:

   • createIndex(indexSpecification): Creates an index on a collection to improve query performance.
   • dropIndex(indexName): Removes an index from a collection.

These operations allow for effective management and manipulation of data within MongoDB collections, enabling users to perform CRUD (Create, Read, Update, Delete) operations and more advanced data processing tasks.