SQL Mastery for Data Engineers | Joins, Window Functions & Grouping | Live Session #2

Welcome to Session 2 of the Data Engineering Roadmap Live Series! In this session, we go deep into SQL — the most critical skill for every data engineer. Whether you're a beginner or brushing up for interviews, this session covers everything you need to write production-level SQL queries. 📌 What We'll Cover: ✅ SQL Joins (INNER, LEFT, RIGHT, FULL OUTER) ✅ GROUP BY & Aggregations (SUM, COUNT, AVG, HAVING) ✅ Window Functions (RANK, ROW_NUMBER, LEAD, LAG, PARTITION BY) ✅ Hands-on live queries with actual datasets