MongoDB does not have out-of-the-box auto-increment functionality, like SQL databases. By default, it uses the 12-byte ObjectId for the _id field as the primary key to uniquely identify the documents. However, there…
Capped collections are fixed-size circular collections that follow the insertion order to support high performance for creating, read, and delete operations. By circular, it means that when the fixed size allocated…
GridFS is the MongoDB specification for storing and retrieving large files such as images, audio files, video files, etc. It is kind of a file system to store files but its…
RockMongo is a MongoDB administration tool using which you can manage your server, databases, collections, documents, indexes, and a lot more. It provides a very user-friendly way of reading, writing,…
Regular Expressions are frequently used in all languages to search for a pattern or word in any string. MongoDB also provides the functionality of regular expression for string pattern matching…
Starting from version 2.4, MongoDB started supporting text indexes to search inside string content. The Text Search uses stemming techniques to look for specified words in the string fields by dropping stemming…
As per the MongoDB documentation, Map-reduce is a data processing paradigm for condensing large volumes of data into useful aggregated results. MongoDB uses mapReduce command for map-reduce operations. MapReduce is generally used for processing…
We have been using MongoDB Object Id in all the previous chapters. In this chapter, we will understand the structure of ObjectId. An ObjectId is a 12-byte BSON type having the following…
In this chapter, we will learn about Indexing Limitations and their other components. Extra Overhead Every index occupies some space as well as causes an overhead on each insert, update…
we have inserted the following document in the collection named users as shown below − db.users.insert( { "address": { "city": "Los Angeles", "state": "California", "pincode":…