MongoDB Learning Roadmap: From Basics to Advanced

1. Getting Started with MongoDB

Introduction to MongoDB: What is MongoDB and why use it? Difference between NoSQL and SQL databases.

Setup: Install MongoDB and Compass (GUI for MongoDB). Set up a local or cloud MongoDB instance using MongoDB Atlas.



2. Core Concepts

Databases and Collections: Understand databases, collections, and documents.

CRUD Operations: Perform Create, Read, Update, and Delete operations using MongoDB shell or Compass.

BSON: Understand how MongoDB stores data in BSON format.



3. Querying Data

Basic Queries: Filter documents using find(). Use operators like $eq, $ne, $lt, $gt, $in, and $nin.

Advanced Queries: Use $and, $or, $not, and $nor. Query arrays and embedded documents.

Projections: Return specific fields using projections in queries.



4. Indexes

Purpose of Indexes: Speed up queries and optimize performance.

Create and Manage Indexes: Single field, compound, and text indexes.

Understand Index Impact: Use the explain() method to analyze query performance.



5. Aggregation Framework

Introduction: Understand the pipeline approach in aggregation.

Basic Stages: $match, $group, $sort, $limit, $project, and $lookup.

Advanced Stages: $unwind, $addFields, $replaceRoot, and $facet.



6. Data Modeling

Schema Design: Differences between embedding and referencing documents.

Relationships: One-to-One, One-to-Many, and Many-to-Many relationships.

Best Practices: Design schemas for scalability and performance.



7. Transactions

Multi-Document Transactions: Implement ACID transactions in MongoDB.

Use Cases: When to use transactions in NoSQL.



8. Working with MongoDB in Applications

MongoDB Drivers: Integrate MongoDB with programming languages like Node.js (Mongoose), Python (PyMongo), and Java.

CRUD Operations in Code: Perform database operations using drivers.



9. Administration and Optimization

Backup and Restore: Use mongodump and mongorestore for backups.

Performance Optimization: Optimize queries, manage indexes, and shard data for horizontal scaling.

Security: Configure authentication, roles, and encryption for secure access.



10. Build Projects



Beginner: Create a basic CRUD app (e.g., contact manager).

Intermediate: Build an inventory management system or blog backend.

Advanced: Design a scalable social media backend with user posts, comments, and likes.

Deploy on MongoDB Atlas or integrate with cloud platforms.

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