Gain insights into MongoDB's core concepts, including queries, CRUD operations, aggregation, and more. Discover how to build applications with hands-on experience and interactive widgets.

mongo.tar.gz

MongoDB is an open-source NoSQL database and stores data in the form of documents. It can be used as an alternative to traditional relational databases. NoSQL databases are schema-less and useful for working with large sets of distributed data. 

In this course, you will learn the core concepts of MongoDB including queries, documents, embedded documents, and operators with advanced features like CRUD operations, bulk write operations, GridFS, indexing, aggregation pipeline, authorization, and more.

You will have plenty of hands-on experience with the help of interactive widgets, and by the end you will have a strong understanding of how to build MongoDB-based applications.

MongoDB: The Complete Guide

MongoDB stores documents in binary serialized format called **BSON**. Let's go through each BSON type supported by MongoDB. 

> The `insert` and `find` commands are used to provide an overview of data types. We’ll cover these in detail later on.



# String

BSON strings are UTF-8, which allows us to use most international characters conveniently. In the below example, `name` is a string field.

db.tasks.insertOne({
    name: "Setup ToDo App",
});

# Integer

The 32-bit integer type represents whole-number values.  An integer field supports values in the range, `-2,147,483,648`–`2,147,483,648`.



# Long

The 64-bit long integer type can represent larger whole numbers. A long integer field supports values in the range `-4,294,967,295`–`4,294,967,295`.



# Decimal

A decimal value can represent numbers with decimal places (non-whole numbers). This gives a higher level of accuracy so most financial applications use the decimal type to store numeric values.



# Double

We use the double data type to store floating values. In the below example, `weight` is a double field.


db.tasks.insertOne({
    progress: 99.99
});

# Boolean

A boolean field supports only two values, `true` and `false`.


db.tasks.insertOne({
    name: "Setup ToDo App",
    is_public: true,
});

Next, we fetch the documents of the `users` collection to check whether it is stored as boolean or not.

```
db.users.find();
```

This command returns the below output.

```
[
  {
    _id: ObjectId("60f7d271b307d94301b9cb8d"),
    name: 'onkar',
    is_public: true
  }
]
```



Learn about all the MongoDB data types and practice creating data type values.

Introduction to Database and MongoDB

Create Database and Authorization

Performing CRUD Operations on MongoDB - Part 1

Performing CRUD Operations on MongoDB - Part 2

MongoDB Query and Database Performance

Learn Additional MongoDB Topics

Appendix

MongoDB Data Types

String

Integer

Long

Decimal

Double

Boolean