Aggregate functions allow you to group together the documents and performs some computation on them, so that a single document is been return. . Retrieve the document from the database Note: We are using testDB database, and from the previous tutorial we are using collection as testCollection 1) Open a new command Prompt. 2) Enter “mongod“, …
In this tutorial we will see about backup and restore data in Mongodb. Starting MongoDB Server and MongoDB Shell 1) Open a new command prompt. 2) Enter “ mongod” and then press ENTER. This is going to run mongodb in the background and we wait for connections on port 27017. Now MongoDB server is running , leave that …
It stores documents on disk in the BSON serialization format. BSON is a binary representation of the JSON documents. Data format of BSON provides more data types than JSON. The mongo JavaScript shell and the MongoDB language drivers translate between the BSON format doucments and the language specificed document representation. BSON supports the following data …
In this tutorial we will learn about how to limit documents, skip some documents and using sorting techniques in mongodb. Retrieve the document from the database Note: We are using testDB database, and from the previous tutorial we are using collection as testCollection 1) Open a new command Prompt 2) Enter “mongod“, and press ENTER (it …
In this tutorial we will talk about indexing. In a textbook you all remember about the index page that contains the metadata, which give details about the chapter number, chapter name and the corresponding page number. Suppose you want to go to chapter number 4, so you just open the index, search for the chapter …