

Abhishek
141 posts

@LoyalDataEng
Learning. Building. Scaling. 🚀 Data Engineer sharing projects, tips & real-world data engineering journeys.








🚀 Day 1/30 – Introduction to SQL 🗄️ Every Data Engineer starts with one language: SQL. If you can master SQL, you're already ahead of many aspiring data professionals. In today's lesson, we'll cover: 📌 What is SQL? 📌 Why SQL is important 📌 History of SQL 📌 Database vs SQL 📌 How SQL works (with diagrams) 📌 Types of SQL Commands (Overview) 📌 Real-world use cases 📌 Interview Questions 📌 Quick Revision Cheat Sheet This isn't just theory—I'll explain everything with visuals, real-world examples, and interview-focused notes. 📖 Part 1: Fundamentals (This Post) 🔥 Part 2: Deep Dive • SQL Architecture • SQL Characteristics • SQL Dialects • SQL Syntax Rules • SQL Data Types • Advanced Interview Questions • Pro Tips 💾 Save this thread—you'll thank yourself during interviews. Tomorrow: DBMS vs RDBMS 🗄️ Follow @LoyalDataEng and join the 30-Day SQL journey. 🚀 #SQL #DataEngineering #DataEngineer #Database #MySQL #PostgreSQL #LearnSQL #TechTwitter #100DaysOfCode #Coding #BigData #DataAnalytics

