SQL Joins When working with relational databases, data is often stored in multiple tables. To combine this data meaningfully, we use SQL Joins . In this article, we will understand: ✅ INNER JOIN ✅ LEFT JOIN ✅ RIGHT JOIN ✅ CROSS JOIN Using simple and clear examples. 📘 Example Tables Notice: Student Devi (dept_id 40) has no matching department. Department MECH (dept_id 50) has no students. 🔹 1. INNER JOIN 📌 Definition Returns only the matching records from both tables. Query: SELECT s.student_id, s.name, d.dept_name FROM Student s INNER JOIN Department d ON s.dept_id = d.dept_id; EXACT OUTPUT: Explanation Only students whose dept_id matches a department are shown. Devi is excluded MECH is excluded 2. LEFT JOIN Definition Returns all records from the left table and matching records from th...