Welcome to the Node.js database tutorial! 🚀 This guide will walk you through integrating databases into your Node.js applications, whether you're using relational or NoSQL systems.

1. Introduction to Databases in Node.js

Node.js provides powerful tools for database interactions. Here's a quick overview:

  • Relational Databases: Use libraries like mysql, pg, or sqlite3 for SQL-based systems.
  • NoSQL Databases: Popular choices include MongoDB (via mongodb driver) or Redis (with ioredis).
  • ORM Tools: Consider Sequelize or TypeORM for object-relational mapping.
database_connection

2. Setting Up a Database Connection

To connect to a database, use async/await for clean code:

const { Client } = require('pg');
async function connectDB() {
  const client = new Client({
    user: 'your_user',
    host: 'localhost',
    database: 'your_db',
    password: 'your_password',
  });
  await client.connect();
  return client;
}

3. CRUD Operations with Examples

Here are basic database operations using MongoDB:

  • Create: await collection.insertOne(data)
  • Read: await collection.find(query).toArray()
  • Update: await collection.updateOne(filter, update)
  • Delete: await collection.deleteOne(filter)
mongodb_query

4. Best Practices

  • Always use environment variables for sensitive info (e.g., DATABASE_URL).
  • Implement error handling with try/catch blocks.
  • Use connection pooling for performance optimization.

For advanced topics, check out our Node.js and Express tutorial to build full-stack applications! 🌐