Added a database section to the web development tutorial

docs/web-developement/database/_category_.json

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+{
+  "label": "Database",
+  "position": 6,
+  "link": {
+    "type": "generated-index",
+    "description": "Learn the fundamentals of databases, including SQL, NoSQL, CRUD operations, and connecting databases to backend frameworks."
+  }
+}

docs/web-developement/database/database-0.md

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+---
+id: introduction-to-databases
+sidebar_position: 1
+title: Introduction to Databases
+sidebar_label: Database Introduction
+---
+
+Hey, everyone! In this guide, we’re going to explore **Databases**, the backbone of modern applications.  
+From storing user information to managing large-scale analytics, databases make it possible to store, retrieve, and manipulate data efficiently.  
+Let’s dive into the fundamentals you need to know! 
+
+---
+
+## 1. What is a Database?
+
+A **database** is an organized collection of data that allows for efficient storage, retrieval, and management.  
+Instead of scattering information across multiple files, databases store data in a **structured** and **centralized** way.
+
+### Key Features:
+- **Structured Storage** → Keeps data in a well-organized format.
+- **Efficient Retrieval** → Query and get the data you need quickly.
+- **Data Integrity** → Ensures data remains accurate and consistent.
+- **Security Controls** → Restricts unauthorized access.
+- **Scalability** → Handles growth in data and users.
+
+:::tip Did You Know?
+Databases power almost every app you use — from Instagram’s feed to your online banking transactions!
+:::
+
+---
+
+## 2. SQL vs NoSQL
+
+Databases generally fall into two main categories: **SQL (Relational)** and **NoSQL (Non-Relational)**.
+
+| Feature | SQL (Relational) | NoSQL (Non-relational) |
+|---------|------------------|------------------------|
+| Structure | Tables (rows & columns) | Flexible formats (JSON, key-value, graph) |
+| Schema | Fixed | Dynamic |
+| Query Language | SQL | API-based or custom |
+| Scaling | Vertical | Horizontal |
+| Examples | MySQL, PostgreSQL, SQLite | MongoDB, Redis, Cassandra |
+
+### SQL Databases:
+- Store data in **tables**.
+- Use **Structured Query Language (SQL)** for queries.
+- Great for structured, related data.
+- **Examples:** MySQL, PostgreSQL, SQLite.
+
+### NoSQL Databases:
+- Store data in flexible formats.
+- Ideal for dynamic or unstructured data.
+- **Examples:** MongoDB, Cassandra, Firebase.
+
+---
+
+## 3. Basic CRUD Operations
+
+CRUD stands for:
+- **Create** – Insert new data.
+- **Read** – Retrieve data.
+- **Update** – Modify existing data.
+- **Delete** – Remove data.
+
+### SQL Example:
+```sql
+-- Create
+INSERT INTO users (name, email) VALUES ('John Doe', '[email protected]');
+
+-- Read
+SELECT * FROM users;
+
+-- Update
+UPDATE users SET email = '[email protected]' WHERE id = 1;
+
+-- Delete
+DELETE FROM users WHERE id = 1;
+``` 
+
+---
+
+## 4. Popular Databases
+
+### 1. MySQL
+- **Type:** Relational, open-source  
+- **Use Case:** Widely used for web applications  
+- **Key Advantage:** Strong community support  
+
+### 2. MongoDB
+- **Type:** NoSQL document database  
+- **Data Format:** Stores data in BSON format  
+- **Key Advantage:** Great for flexible schemas  
+
+### 3. PostgreSQL
+- **Type:** Advanced relational database  
+- **Features:** Supports JSON, indexing, full-text search  
+- **Key Advantage:** Open-source and highly extensible  
+
+
+---
+
+
+## 5. Connecting Databases to Backend Frameworks
+
+Connecting a database to your backend allows you to store, retrieve, and manipulate application data dynamically.
+General Steps to Connect Any DB to a Backend Framework
+
+1. **Install the relevant driver or ORM**  
+   Examples: `mysql2`, `mongoose`, `pg`, `prisma`
+2. **Import the library**  
+   Add it to your backend code using `require` or `import`.
+3. **Configure connection parameters**  
+   Include:- Host, Username, Password, Database name
+4. **Open the connection**  
+   Establish the connection before handling API requests.
+5. **Perform CRUD operations**  
+   Use the connection to Create, Read, Update, and Delete data.
+6. **Close the connection gracefully**  
+   Ensure cleanup when the application stops.
+
+
+---
+
+
+## Quiz Time
+
+import { Quiz } from '@site/src/components/Quiz';
+import quiz from './quiz.json';
+
+<Quiz questions={quiz} />
+
+
+