*SELF JOIN & CROSS JOIN IN SQL* *1. SELF JOIN* A SELF JOIN is a regular join where a table is joined with itself. *When to use:* When rows in the same table relate to each other. Example: Employees and their managers in the same employee table. *Example:* SELECT A.name AS employee, B.name AS manager FROM employees A JOIN employees B ON A.manager_id = B.id; Here, you're joining the employees table with itself to get each employee’s manager. *2. CROSS JOIN* A CROSS JOIN returns the cartesian product of two tables — every row of the first table combined with every row of the second. *When to use:* When you need all possible combinations. Useful in generating calendars, test data, etc. *Example:* SELECT * FROM colors CROSS JOIN sizes; If colors has 3 rows and sizes has 4 rows, the result will have 3 × 4 = 12 rows. *React with ❤️ if you're ready for the next quiz.* 📝