MongoDB – Replication 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 from the loss of a single server. Replication also allows you to recover from hardware failure and service interruptions. With additional copies […]
Category Archives: mongodb
MongoDB – Projection In MongoDB, projection means selecting only the necessary data rather than selecting whole of the data of a document. If a document has 5 fields and you need to show only 3, then select only 3 fields from them. The find() Method MongoDB”s find() method, explained in accepts second optional parameter that […]
MongoDB – Query Document In this chapter, we will learn how to query document from MongoDB collection. The find() Method To query data from MongoDB collection, you need to use MongoDB”s find() method. Syntax The basic syntax of find() method is as follows − >db.COLLECTION_NAME.find() find() method will display all the documents in a non-structured […]