Indexing Limitations Extra Overhead Every index occupies some space as well as causes an overhead on each insert, update and delete. So if you rarely use your collection for read operations, it makes sense not to use indexes. RAM Usage Since indexes are stored in RAM, you should make sure Read more…
Limitations of MongoDB In this chapter, we will learn about Indexing Limitations and its other components. Extra Overhead Every index occupies some space as well as causes an overhead on each insert, update and delete. So if you rarely use your collection for read operations, it makes sense not to Read more…
Analyzing Query Analyzing queries is a very important aspect of measuring how effective the database and indexing design is. We will learn about the frequently used $explain and $hint queries. Using $explain The $explain operator provides information on the query, indexes used in a query and other statistics. It is very useful when analyzing how well Read more…
Mongo-PhP To use MongoDB with PHP, you need to use MongoDB PHP driver. Download the driver from the url Download PHP Driver. Make sure to download the latest release of it. Now unzip the archive and put php_mongo.dll in your PHP extension directory (“ext” by default) and add the following line Read more…
Java-MongoDB In this chapter, we will learn how to set up MongoDB CLIENT. Installation Before you start using MongoDB in your Java programs, you need to make sure that you have MongoDB CLIENT and Java set up on the machine. You can check Java tutorial for Java installation on your Read more…
MongoDB-Deployment When you are preparing a MongoDB deployment, you should try to understand how your application is going to hold up in production. It’s a good idea to develop a consistent, repeatable approach to managing your deployment environment so that you can minimize any surprises once you’re in production. The Read more…
Limiting Records 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 limit() method. The method accepts one number type argument, which is the number of documents that you want to be displayed. Syntax The basic syntax Read more…
Create Data Base The use Command MongoDB use DATABASE_NAME is used to create database. The command will create a new database if it doesn’t exist, otherwise it will return the existing database. Syntax Basic syntax of use DATABASE statement is as follows − use DATABASE_NAME Example If you want to use a database with Read more…
Advantages of MongoDB over RDBMS Schema less − MongoDB is a document database in which one collection holds different documents. Number of fields, content and size of the document can differ from one document to another. Structure of a single object is clear. No complex joins. Deep query-ability. MongoDB supports dynamic Read more…
Constructor in ReactJS React Constructor The method used to initialize an object’s state and which is automatically called during the creation of an object in a class is known as a constructor in ReactJS. It is called before the component is mounted in ReactJS, but the constructor is not necessary Read more…