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A Complete MongoDB Introduction Tutorial - Habilelabs

This is a complete MongoDB introduction tutorial. Here I am targeting audience which is new to MongoDB and knows some concepts of Database, I will compare the concept of RDBMS (like MySql) to MongoDB for easy understanding. So Let’s start this tutorial with what is MongoDB database?

What is MongoDB Database?

MongoDB is a document-oriented NoSQL database.
Let me go by each word in above definition
(1) NoSQL: Instead of using tables and rows as in relational databases, NoSQL is built on an architecture of collections and documents.
(2) Document-Oriented: Documents comprise sets of key-value pairs and are the basic unit of data in MongoDB.
Collections contain sets of documents and function as the equivalent of relational database tables.

MongoDB Provides following features :
– Scalable High-Performance Open-source, Document-orientated database.
– Built for Speed – the performance of traditional key-value stores while maintaining functionality of traditional RDBMS.
– Rich Document based queries for Easy readability.
– Full Index Support for High Performance.
– Replication and Failover for High Availability.
– Auto Shading for Easy Scalability.
– Map / Reduce for Aggregation.

I will explain above features in this blog on introduction level, after reading this blog you will get familiar to MongoDB

Read this if you want to know, Why choose MongoDB over other Databases?

Operational Database Landscape

Before proceeding deep into concepts of MongoDB let me tell you where does MongoDB stand in front of all data storage. If we compare MongoDB with RDBMS and other data storage source in the scale of functionality and Scalability /Performance MongoDB gives almost same functionality as RDBMS and slightly less Scalability /Performance compare to Key/value storage we can plot MongoDB in a graph as below :

operational database landscape

With above graph, you can understand we can leverage the performance of traditional key-value stores while maintaining functionality of traditional RDBMS.

Why should we use MongoDB?

We all use programming languages and deal with objects in all most of languages, Nowadays, everyone works with objects(Python/Ruby/Java/JS etc.) OOPS is really a very strong concept in computer science, SQL was invented in the 70’s to store data. The problem with SQL is it’s tabular if you want to store anything you need to map your object to a table and need to write logic for mapping, and if you want to store related data you need to use complex joints so if we need Databases to persist our objects. Then why not store objects directly? MongoDB stores objects (or) documents.

Concept Mapping

Concept Mapping

Database

You can relate it with Database in your RDBMS, In RDBMS you need to create db separably but in MongoDB it is Created on-the-fly when referenced for the first time. The database is Made up of Multiple Collections.

Collection

The collection is similar to tables in RDBMS, the difference is MYSQL Table is the collection of rows/records with a fixed schema but MongoDB collection is Schema-less and contains Documents. Schema-less means you don’t need to predefined columns as you do in RDBMS here you can have any key-value pair in any record. Collection is Indexable by one/more keys. and it is Created on-the-fly when referenced for the first time.

Document

A document in MongoDB is similar to a row in RDBMS. You can store JSON object as a document in Collection. All languages support conversion of the object to JSON and again JSON to native object, Each collection in MongoDB can have _id key – works like Primary keys in MySQL. Document Supported Relationship with linking to another document, I will show you liking in this blog

How does MongoDB store data

MongoDB uses BSON internally to store JSON objects, let’s say you want to store Hello as key and World as value, BSON will store it as below :

MongoDB data store

Flexible “Schemas”

I hope you have gone through Schema-less is this blog multi-pal times and some of you still want to know why we should use schema-less structure, so in a current way you need to think a log about your DB structure before starting of you coding phase with help of schema-less you can :

– Store and combine data of any structure
– No need of giving sophisticated validation rules
– You can dynamically modify the schema without downtime
– Fast, Iterative Development
– You spend less time prepping your data for the database, and more time putting your data to work.

What are common use cases for MongoDB?

– The most common use cases for MongoDB include

MongoDB use cases

The Largest Ecosystem

So let us talk about some numbers, I have taken stats from MongoDB official site

– 10,000,000+ MongoDB Downloads
– 300,000+ Online Education Registrants
– 40,000+ MongoDB Cloud Manager Users
– 35,000+ MongoDB User Group Members
– 1,000+ Technology and Services Partners
– 2,000+ Customers Across All Industries

When would RDBMS be a better fit?

MongoDB is not a drop-in replacement for legacy applications built around the relational data model and SQL, based on the use case you can choose from MongoDB or RDBMS, Applications that require complex, multi-row transactions (e.g., a double-entry bookkeeping system) RDBMS will be better to use.

SQL Database vs MongoDB

SQL vs MongoDB

Understanding the Document

Let say you want to store something in MongoDB for an example an object will look like below:

Understanding the document

Query

Query is important to get any data from DB MongoDB provides Rich JavaScript based Query syntax and allow us to perform deep, nested queries
Example
// find posts which have ‘MongoDB’ tag
db.posts.find({tags: ‘MongoDB’});

Some Cool features of MongoDB

Here are couple of cool MongoDB features

– Horizontally Scalable Architectures – no  joins + no  complex  transactions
– Geospatial Indexes for Geospatial queries. $near, $within_distance, Bound queries (circle, box)
– GridFS Stores Large Binary Files.
– Map/Reduce GROUP BY in SQL, map/reduce in MongoDB.

How do we use MongoDB at Habilelabs

We at Habilelabs use with Nodejs, generally as a database of REST API Projects in MEAN stack. We use mongoosejs object modeling which helps us in writing MongoDB validation, casting and business logic boilerplates here is link for mongoosejs : http://mongoosejs.com/

Download this MongoDB Introduction Tutorial PDF Here:

Habilelabs provides MongoDB Development with high-quality standards, Discuss Your Project.

Do you have any queries or discussions on MongoDB introduction drop me a line in the comment box?

I hope you found this post helpful, So don’t forget to share this post with friends.

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http://tableluv.gr/

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AdramMedia

"Team habilelabs are truly great developers to work with, and ensure that the work is completed to the highest of standards. Real pleasure to work with would highly recommend for Node.js / React.js work."

Liamsm

"Habilelabs is a fabulous company. Excellent in quality and always available for communication. We hired Habilelabs team for doing the frontend of my application and they gave me some good tips about backend APIs as well, which tells a lot about their overall expertise. Really appreciate their sincerity, timely delivery and professionalism. Will definitely hire them again in future."

Atul Shrivastava

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Moshe Levy

"Love the Company Habilelabs . Knew thier stuff and really came through for me."

Zehash

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Anthony Hu

"iSEEit has been closely working with Habilelabs team ever since our company needed to step up development efforts. Being a rapidly evolving software company, we have come across a multitude of challenges over time but Habilelabs has proactively solved issues impacting the business and handled the continuous releases of the applications without downtime. We are very satisfied and happy to have found Habilelabs as our offshore development partner as they have developed a good understanding of our own vision and work flows."

iSEEit

Rizan Flenner

"Amazing and skilled team we been learning from each other for quite some time, and still working together.
Always available and ready to make great results, or to improve unexpected problems."

Siquo

Daniel White

https://www.siquo.com/

"I am very pleased with the work Habilelabs provides. Every time we have worked, projects were delivered on time. They provide great support and I would totally recommend Habilelabs to anyone that wants to get a project done on time and professionally."

Tableluv

Xenophon Kanarios

http://tableluv.gr/

"Habilelabs is an excellent and affordable programming team that delivers fast results."

Paiusa

Stephen Blaney

http://www.paiusa.com/

"Good mindset, good technical competence and skills, always fix problems when needed."

Denthub

Arash Fard-Rahmani

"We have been extremely satisfied with the project that has been delivered by Habilelabs. They are very professional with great commitments. Quality of communication and problem solving skills were perfect."

Safak Korkut

"Very much satisfied the work. Team quickly understood the requirements and completed work on time. Would definitely recommend him. We will like to hire them again"

Stanislav M.

"Habilelabs is the definition of professional and friendly. They knew exactly what they are doing and never shy to share their knowledge. We will definitely consider hiring them for future projects! Great Work!"

Eben B.

"Great work, will hire team Habilelabs again. I appreciate the extra effort. Excellent work as always."

Saasmath

"Very fast and professional Team. They knows exactly what needs to be developed to achieve the project goal. We will hire them again"

Mediaroot

"Very good work, Little expencive for us but prefere to work with them because I'm sure the work will be done 100%"

ProwebMedia

"Team habilelabs is a pleasure to work with and we will work with them again. They are professional, easy to communicate with, and completes tasks on time and on budget."

KCRW

"Really impressed with the high quality work and professionalism!"

Vaibhav Samadhiya

"We worked Habilelabs team and they are very professional, motivated and experienced developer. I would love to work with them in the future again!"

Mahdishahadat

"We had a great collaboration with Habilelabs. They are very communicative, extremely competent and responsive. We are looking forward to continuing our collaboration with Habilelabs. I recommend them with full confidence."

Safkutkorfak

"I'm very impressed with work quality. Habilelabs shows outstanding performance and knowledge in area needed for our project. I'm fully satisfied with Habilelabs's service. Will look for more opportunities to work with them"

AdramMedia

"Team habilelabs are truly great developers to work with, and ensure that the work is completed to the highest of standards. Real pleasure to work with would highly recommend for Node.js / React.js work."

Liamsm

"Habilelabs is a fabulous company. Excellent in quality and always available for communication. We hired Habilelabs team for doing the frontend of my application and they gave me some good tips about backend APIs as well, which tells a lot about their overall expertise. Really appreciate their sincerity, timely delivery and professionalism. Will definitely hire them again in future."

Atul Shrivastava

"very good very profasional, They did good job on time +++"

Moshe Levy

"Love the Company Habilelabs . Knew thier stuff and really came through for me."

Zehash

"5 stars work, very good communication, timely delivery."

Anthony Hu