Replication is the process of synchronizing data across multiple servers. Replication provides redundancy and increases data availability with multiple copies of data on different database servers. Replication protects a database…
Aggregations operations process data records and return computed results. Aggregation operations group values from multiple documents together and can perform a variety of operations on the grouped data to return…
Indexes support the efficient resolution of queries. Without indexes, MongoDB must scan every document of a collection to select those documents that match the query statement. This scan is highly…
In this chapter, we will learn how to sort records in MongoDB. The sort() Method To sort documents in MongoDB, you need to use the sort() method. The method accepts a document…
In this chapter, we will learn how to limit records using MongoDB. The Limit() Method To limit the records in MongoDB, you need to use the limit() method. The method accepts one…
In MongoDB, projection means selecting only the necessary data rather than selecting the whole of the data of a document. If a document has 5 fields and you need to…
In this chapter, we will learn how to delete a document using MongoDB. The remove() Method MongoDB's remove() method is used to remove a document from the collection. remove() method accepts two…
MongoDB's update() and save() methods are used to update document into a collection. The update() method updates the values in the existing document while the save() method replaces the existing document with the document…
In this chapter, we will learn how to query documents from the MongoDB collection. The find() Method To query data from MongoDB collection, you need to use MongoDB's find() method. Syntax The…
In this chapter, we will learn how to insert documents into the MongoDB collection. The insert() Method To insert data into MongoDB collection, you need to use MongoDB's insert() or save() method. Syntax The…