Introduction to MongoDB

MongoDB is a popular NoSQL database that is attracting a lot of developers worldwide. It is different from traditional relational databases such as MySQL, PostgreSQL, and SQLite3. The main big difference of MongoDB compared to other databases is the ease of scalability at the time of internet traffic. It also has JSON as its data model, which allows us to store JSON directly into the database.

Many huge companies such as Expedia, Comcast, and Metlife built their applications on MongoDB. It is already proven as a vital element in modern internet businesses. MongoDB stores data in a document; think of this as a row in SQL databases. All MongoDB documents are stored in a collection, and the collection is a table (in SQL analogy). A sample document for an IMDB movie looks like this:

{
  _id: 5,
  name: 'Star Trek',
  year: 2009,
  directors: ['J.J. Abrams'],
  writers: ['Roberto Orci', 'Alex Kurtzman'],
  boxOffice: {
     budget:150000000,
     gross:257704099
  }
}

The...