SQL Learning Journey

Welcome to my SQL Learning Journey repository! This repository is a curated collection of notes, concepts, and code snippets as I explore and master SQL. 🚀

📚 Table of Contents

1. Introduction
2. 15-Day Learning Plan
3. Code Examples
4. Contributing
5. Contact

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🛠 Introduction

Structured Query Language (SQL) is the standard language for managing and manipulating relational databases. This repository is my journey to:

• Master SQL fundamentals.
• Work with databases like MySQL, PostgreSQL, and SQLite.
• Learn query optimization and advanced SQL techniques.
• Build real-world SQL projects.

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🗓️ 15-Day Learning Plan

Day 1-5: Basics of SQL

• Topics Covered:
  • Introduction to Databases and SQL
  • Writing basic queries: SELECT, WHERE, LIMIT
  • Filtering Data: AND, OR, NOT, BETWEEN, IN
  • Sorting Results: ORDER BY

Day 6-10: Intermediate SQL

• Topics Covered:
  • Aggregation: COUNT, SUM, AVG, MIN, MAX
  • Grouping Data: GROUP BY, HAVING
  • Table Joins: INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN
  • Subqueries and Nested Queries

Day 11-15: Practical Applications

• Topics Covered:
  • Writing complex queries
  • Debugging and testing SQL scripts
  • Hands-on projects with real datasets

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💻 Code Examples

Example 1: Selecting Data

SELECT first_name, last_name, email
FROM employees
WHERE department = 'Sales';

Example 2: Aggregating Data

SELECT department, COUNT(*) AS employee_count
FROM employees
GROUP BY department
HAVING COUNT(*) > 10;

Example 3: Joining Tables

SELECT orders.order_id, customers.customer_name, orders.total_amount
FROM orders
INNER JOIN customers ON orders.customer_id = customers.customer_id;

Here’s an example of a README formatted for code-based GitHub repositories. I’ve fixed your example and added additional refinements to make it cohesive:

markdown Copy code

SQL Learning Journey

Welcome to my SQL Learning Journey repository! This repository is a curated collection of notes, concepts, and code snippets as I explore and master SQL. 🚀

📚 Table of Contents

1. Introduction
2. 15-Day Learning Plan
3. Code Examples
4. Contributing
5. Contact

---

🛠 Introduction

Structured Query Language (SQL) is the standard language for managing and manipulating relational databases. This repository is my journey to:

• Master SQL fundamentals.
• Work with databases like MySQL, PostgreSQL, and SQLite.
• Learn query optimization and advanced SQL techniques.
• Build real-world SQL projects.

---

🗓️ 15-Day Learning Plan

Day 1-5: Basics of SQL

• Topics Covered:
  • Introduction to Databases and SQL
  • Writing basic queries: SELECT, WHERE, LIMIT
  • Filtering Data: AND, OR, NOT, BETWEEN, IN
  • Sorting Results: ORDER BY

Day 6-10: Intermediate SQL

• Topics Covered:
  • Aggregation: COUNT, SUM, AVG, MIN, MAX
  • Grouping Data: GROUP BY, HAVING
  • Table Joins: INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN
  • Subqueries and Nested Queries

Day 11-15: Practical Applications

• Topics Covered:
  • Writing complex queries
  • Debugging and testing SQL scripts
  • Hands-on projects with real datasets

---

💻 Code Examples

Example 1: Selecting Data

SELECT first_name, last_name, email
FROM employees
WHERE department = 'Sales';
📂 See more examples here

Example 2: Aggregating Data

SELECT department, COUNT(*) AS employee_count
FROM employees
GROUP BY department
HAVING COUNT(*) > 10;
📂 Aggregation Examples

Example 3: Joining Tables

SELECT orders.order_id, customers.customer_name, orders.total_amount
FROM orders
INNER JOIN customers ON orders.customer_id = customers.customer_id;

📂 Join Examples

SELECT orders.order_id, customers.customer_name, orders.total_amount
FROM orders
INNER JOIN customers ON orders.customer_id = customers.customer_id;

🤝 Contributing Contributions are welcome! If you have useful examples or suggestions, feel free to fork this repo, create a branch, and submit a pull request. Let’s learn SQL together! 💡

📬 Contact For questions or feedback, feel free to reach out:

📧 Email: [email protected] 💼 LinkedIn: manjay verma