Introduction to Databases & SQL | MySQL & PostgreSQL Mastery Course | Lets Decode AI

Published: 10 September 2025
on channel: Lets Decode AI

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Welcome to *Day 1 of the SQL Mastery Course* by **Lets Decode AI**.
This is a *free video lesson* from our complete beginner-to-advanced **MySQL Mastery Course**, designed for students, professionals, and aspiring data scientists who want to build a solid foundation in SQL and relational databases.

👉 Enroll in the full course here:
letsdecodeai.in

What You’ll Learn in this Lesson

What is Data? (Structured vs. Unstructured)
What is a Database & Why do we need it?
Relational Databases: Tables, Rows, and Columns
Introduction to *SQL (Structured Query Language)* and its role in Data Science
*MySQL vs. PostgreSQL* – Key similarities & differences
Step-by-step installation of MySQL and PostgreSQL
Your very first SQL command: `SELECT 'Hello SQL';`

About Lets Decode AI

At Lets Decode AI, our mission is to make *AI, Data Science, and Machine Learning education* accessible and practical for everyone.
Through structured courses, hands-on projects, quizzes, and assignments, we help learners go from **absolute beginner to job-ready AI professionals**.

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*Next Steps*

✅ Watch this video and follow along.
✅ Subscribe to this channel for more free lessons.
✅ Join the complete course here: https://class.letsdecodeai.in/courses...

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*Who Should Watch This Video?*

Beginners with no prior SQL experience
Data Science & AI aspirants
Students preparing for internships or job roles
Software engineers & analysts wanting to strengthen database skills

🎓 This is *just Day 1* — the full course includes step-by-step modules, practice assignments, quizzes, and mini-projects that will help you master SQL and apply it in real-world data scenarios.

👉 Subscribe and learn with Lets Decode AI today.

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